3D visualization (using Google Earth) of OTA transmitting locations! - AVS Forum
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Old 03-18-2007, 04:16 PM - Thread Starter
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Here is a file that has all the TV transmitter records from the FCC database converted into a Google Earth file. It will let you visualize where all the TV transmitters are located relative to your location within the 3D world of Google Earth.

I'll try to maintain updates here and post additional tools & info for OTA seekers as things develop.



Content details:
  • FCC data was extracted on 6/20/2007
  • 14,799 records were found
  • Icons were placed in separate Analog and Digital subfolders
  • Extracted record types include
    - TV / DT
    - Repeaters / Boosters
    - Translators
    - Special Temporary Authorities (STAs)
    - Low Power TV / DT
  • Each icon is set to the elevation specified in the FCC database for 3D viewing


Change log:

20-Jun-2007
· Updated to latest snapshot of FCC database
· Fixes for KDEV and WKBW [thanks milehighmike]

24-May-2007
· Updated to latest snapshot of FCC database
· Fix for KMGH
· Added network affiliation to transmitter details

6-May-2007
· Updated to latest snapshot of FCC database
· Fixes for KCAH, KSPX, KYW, WWOR, and WNET

28-Apr-2007
· Updated to latest snapshot of FCC database
· Fixes for WGHP, KMMW-LP, K45HC, KCNC, KRMA, KUSA, and KTVD [thanks Calaveras and longrider]

16-Apr-2007
· Updated to latest snapshot of FCC database
· Fix for WWRD-LP and W66AQ [thanks Nitewatchman]

14-Apr-2007
· Updated to latest snapshot of FCC database
· Fix for W42CK [thanks Trip in VA]
· Changed callsign determination algorithm that fixed a lot of transmitters that were previously overlooked. This added 1,520 transmitters to the total collection.

10-Apr-2007
· Updated to latest snapshot of FCC database.
· Fixes for WJJA-TV and WYIN-TV [thanks sebenste]

1-Apr-2007
· Fixed software bug that caused several transmitters to be omitted. If you downloaded this file prior to today, I recommend that you download it again.

30-Mar-2007
· Updated to latest FCC database snapshot
· Now, clicking on a transmitter icon brings up a balloon with vital stats and a link to the FCC query


Requirements:
  • Google Earth 4.0 or later (free download from here)
  • A very good 3D graphics card
  • Lots of RAM
  • A fast internet connection


As an example, here is a view of the transmitter icons on Mt. Wilson looking down toward Los Angeles:


Comments:
  • The FCC database is known to contain various errors including simple typos, outdated entries, future entries (license grants that haven't been built yet), erroneous technical details, a few missing entries, and some superfluous entries. Since this is essentially a capture of the FCC database, most of the same errors will show up here.

  • Despite the limitations of the source data, I believe this data set to be better than 95% accurate. If you know of any specific errors that should be corrected, please let me know so that future releases will contain the fix.

  • Setting the terrain exaggeration to 3 (max) in the Google Earth options makes it a lot easier to see the more subtle terrain variations. Just note that this also exaggerates the transmitter heights, so the exaggeration should be set back to 1 if you want the transmitter heights to have the correct relative altitude appearance.

  • There are a LOT of icons to display in this file. Trying to display all the transmitters on screen at one time can really slow down some computers and graphics cards. It might help to turn off the transmitter display first, zoom into an area of interest, and then turn the transmitter display back on. In this file, the transmitter display is initially turned off. The icons can be turned on via the check box next to the desired sub-folder.


Best regards,
Andy



P.S. AVS Forum does not allow attachments larger than 500KB and the latest Transmitter Icons file is now 507KB, so you'll need to go to www.tvfool.com to download the latest file. Sorry for any inconvenience. I'm sure the file will come back down in size around the February 2009 shutdown of analog transmitters.
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Old 03-26-2007, 04:44 AM - Thread Starter
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These are transmitter placemarks and coverage maps that have been created for viewing in Google Earth. Individual packages per metro will be made available here. The purpose of these files is to help you visualize the TV "environment" within the 3D virtual world of Google Earth and perhaps help you understand some of the factors that affect your ability to receive OTA broadcasts.

The result should be something like this:
With the full 3D capabilities of Google Earth, you can "fly around" and explore the transmitters and coverage maps interactively.



Requirements:
  • Google Earth 4.0 or later (free download from here)
  • A very good 3D graphics card
  • Lots of RAM
  • Fast internet connection
  • ********** client for downloading the files
Note: To avoid burdening the forum servers and for better download speeds, I am distributing these files via **********. If you need help with downloading torrents, try reading this FAQ. Some popular free ********** clients include


uTorrent (Windows)
Azureus (Java, any platform)
**********/Mainline (Python, any platform)


If you are looking for a specific coverage map, you can try search through the master callsign list at tvfool.com.

Metropolitan Statistical Areas (MSAs):


1. New York, NY - last updated 4-Jun-2007, 126 transmitters (59.7 MB download torrent)
2. Los Angeles, CA - last updated 4-Jun-2007, 169 transmitters (64.0 MB download torrent)
3. Chicago, IL - last updated 4-Jun-2007, 88 transmitters (61.6 MB download torrent)
4. Washington D.C. - Baltimore, MD - last updated 4-Jun-2007, 91 transmitters (68.1 MB download torrent)
5. San Francisco, CA - last updated 4-Jun-2007, 104 transmitters (83.3 MB download torrent)
6. Philadelphia, PA - last updated 4-Jun-2007, 97 transmitters (55.2 MB download torrent)
7. Boston, MA - last updated 4-Jun-2007, 84 transmitters (64.6 MB download torrent)
8. Detroit, MI - last updated 4-Jun-2007, 100 transmitters (83.7 MB download torrent)
9. Dallas - Ft. Worth, TX - last updated 4-Jun-2007, 57 transmitters (53.6 MB download torrent)
10. Houston, TX - last updated 4-Jun-2007, 63 transmitters (46.1 MB download torrent)
11. Atlanta, GA - last updated 4-Jun-2007, 63 transmitters (41.7 MB download torrent)
12. Miami - Ft. Lauderdale, FL - last updated 4-Jun-2007, 75 transmitters (28.0 MB download torrent)
13. Seattle, WA - last updated 4-Jun-2007, 60 transmitters (41.2 MB download torrent)
14. Phoenix, AZ - last updated 4-Jun-2007, 59 transmitters (32.4 MB download torrent)
15. Minneapolis - St. Paul, MN - last updated 4-Jun-2007, 43 transmitters (50.6 MB download torrent)
16. Cleveland, OH - last updated 4-Jun-2007, 72 transmitters (49.8 MB download torrent)
17. San Diego, CA - last updated 4-Jun-2007, 73 transmitters (22.4 MB download torrent)
18. St. Louis, MO - last updated 4-Jun-2007, 40 transmitters (37.8 MB download torrent)
19. Denver, CO - last updated 4-Jun-2007, 150 transmitters (69.9 MB download torrent)
20. Tampa, FL - last updated 4-Jun-2007, 67 transmitters (30.4 MB download torrent)
21. Pittsburgh, PA - last updated 4-Jun-2007, 82 transmitters (52.7 MB download torrent)
22. Portland, OR - last updated 4-Jun-2007, 100 transmitters (51.8 MB download torrent)
23. Cincinnati, OH - last updated 4-Jun-2007, 54 transmitters (47.0 MB download torrent)
24. Sacramento, CA - last updated 4-Jun-2007, 69 transmitters (43.6 MB download torrent)
25. Kansas City, MO - last updated 4-Jun-2007, 42 transmitters (43.5 MB download torrent)
26. Milwaukee, WI - last updated 4-Jun-2007, 74 transmitters (57.6 MB download torrent)
27. Orlando, FL - last updated 4-Jun-2007, 104 transmitters (57.5 MB download torrent)
28. Indianapolis, IN - last updated 4-Jun-2007, 52 transmitters (42.0 MB download torrent)
29. San Antonio, TX - last updated 4-Jun-2007, 83 transmitters (51.5 MB download torrent)
30. Norfolk, VA - last updated 4-Jun-2007, 66 transmitters (42.6 MB download torrent)
31. Las Vegas, NV - last updated 16-Jun-2007, 128 transmitters (35.7 MB download torrent)
32. Columbus, OH - last updated 16-Jun-2007, 65 transmitters (47.1 MB download torrent)
33. Charlotte, NC - last updated 16-Jun-2007, 54 transmitters (45.4 MB download torrent)
34. New Orleans, LA - last updated 16-Jun-2007, 63 transmitters (38.6 MB download torrent)
35. Salt Lake City, UT - last updated 16-Jun-2007, 280 transmitters (57.2 MB download torrent)
36. Greensboro, NC - last updated 16-Jun-2007, 67 transmitters (54.3 MB download torrent)
37. Austin, TX - last updated 16-Jun-2007, 92 transmitters (59.2 MB download torrent)
38. Nashville, TN - last updated 16-Jun-2007, 62 transmitters (43.6 MB download torrent)
39. Providence, RI - last updated 16-Jun-2007, 97 transmitters (72.7 MB download torrent)
40. Raleigh, NC - last updated 16-Jun-2007, 76 transmitters (65.7 MB download torrent)
41. Hartford, CT - last updated 16-Jun-2007, 90 transmitters (62.0 MB download torrent)
42. Buffalo, NY - last updated 16-Jun-2007, 91 transmitters (58.8 MB download torrent)
43. Memphis, TN - last updated 16-Jun-2007, 61 transmitters (44.7 MB download torrent)
44. West Palm Beach, FL - last updated 16-Jun-2007, 79 transmitters (31.8 MB download torrent)
45. Jacksonville, FL - last updated 16-Jun-2007, 60 transmitters (32.3 MB download torrent)
46. Rochester, NY - last updated 16-Jun-2007, 103 transmitters (63.4 MB download torrent)
47. Grand Rapids, MI - last updated 16-Jun-2007, 70 transmitters (45.7 MB download torrent)
48. Oklahoma City, OK - last updated 16-Jun-2007, 64 transmitters (43.8 MB download torrent)
49. Louisville, KY - last updated 16-Jun-2007, 47 transmitters (37.2 MB download torrent)
50. Richmond, VA - last updated 16-Jun-2007, 73 transmitters (55.4 MB download torrent)
51. Greenville, SC - last updated 16-Jun-2007, 138 transmitters (62.6 MB download torrent)
52. Dayton, OH - last updated 16-Jun-2007, 89 transmitters (69.5 MB download torrent)
53. Fresno, CA - last updated 16-Jun-2007, 71 transmitters (36.4 MB download torrent)
54. Birmingham, AL - last updated 16-Jun-2007, 72 transmitters (47.4 MB download torrent)
55. Honolulu, HI - last updated 16-Jun-2007, 33 transmitters ( 7.3 MB download torrent)
56. Albany, NY - last updated 16-Jun-2007, 85 transmitters (46.4 MB download torrent)
57. Tucson, AZ - last updated 16-Jun-2007, 37 transmitters (24.8 MB download torrent)
58. Tulsa, OK - last updated 16-Jun-2007, 54 transmitters (37.8 MB download torrent)
59. Syracuse, NY - last updated 16-Jun-2007, 112 transmitters (73.5 MB download torrent)
60. Omaha, NE - last updated 16-Jun-2007, 71 transmitters (51.5 MB download torrent)
61. Albuquerque, NM - last updated 16-Jun-2007, 55 transmitters (46.7 MB download torrent)
62. Knoxville, TN - last updated 16-Jun-2007, 123 transmitters (47.8 MB download torrent)
63. El Paso, TX - last updated 16-Jun-2007, 37 transmitters (22.5 MB download torrent)
64. Bakersfield, CA - last updated 16-Jun-2007, 106 transmitters (29.4 MB download torrent)
65. Allentown, PA - last updated 16-Jun-2007, 153 transmitters (82.8 MB download torrent)
66. Harrisburg, PA - last updated 16-Jun-2007, 96 transmitters (52.5 MB download torrent)
67. Scranton, PA - last updated 16-Jun-2007, 137 transmitters (52.1 MB download torrent)
68. Toledo, OH - last updated 16-Jun-2007, 86 transmitters (64.6 MB download torrent)
69. Baton Rouge, LA - last updated 16-Jun-2007, 92 transmitters (52.5 MB download torrent)
70. Youngstown, OH - last updated 16-Jun-2007, 107 transmitters (73.6 MB download torrent)
71. Springfield, MA - last updated 16-Jun-2007, 120 transmitters (89.2 MB download torrent)
72. Sarasota, FL - last updated 16-Jun-2007, 85 transmitters (40.6 MB download torrent)
73. Little Rock, AR - last updated 16-Jun-2007, 41 transmitters (38.0 MB download torrent)
74. McAllen, TX - last updated 16-Jun-2007, 38 transmitters (16.3 MB download torrent)
75. Stockton, CA - last updated 16-Jun-2007, 101 transmitters (79.9 MB download torrent)
76. Charleston, SC - last updated 16-Jun-2007, 42 transmitters (22.7 MB download torrent)
77. Wichita, KS - last updated 16-Jun-2007, 27 transmitters (21.9 MB download torrent)
78. Mobile, AL - last updated 16-Jun-2007, 50 transmitters (29.0 MB download torrent)
79. Columbia, SC - last updated 16-Jun-2007, 47 transmitters (39.3 MB download torrent)
80. Colorado Springs, CO - last updated 16-Jun-2007, 109 transmitters (56.6 MB download torrent)
81. Fort Wayne, IN - last updated 16-Jun-2007, 67 transmitters (46.7 MB download torrent)
82. Daytona Beach, FL - last updated 16-Jun-2007, 67 transmitters (36.6 MB download torrent)
83. Lakeland, FL - last updated 16-Jun-2007, 117 transmitters (59.9 MB download torrent)
84. Johnson City, TN - last updated 16-Jun-2007, 126 transmitters (47.5 MB download torrent)
85. Lexington, KY - last updated 16-Jun-2007, 42 transmitters (28.0 MB download torrent)
86. Augusta, GA - last updated 16-Jun-2007, 46 transmitters (36.1 MB download torrent)
87. Melbourne, FL - last updated 16-Jun-2007, 69 transmitters (34.3 MB download torrent)
88. Lancaster, PA - last updated 2-May-2007, 105 transmitters (73.7 MB download torrent)
89. Chattanooga, TN - last updated 2-May-2007, 58 transmitters (34.7 MB download torrent)
90. Des Moines, IA - last updated 2-May-2007, 44 transmitters (35.6 MB download torrent)
91. Kalamazoo, MI - last updated 2-May-2007, 93 transmitters (68.6 MB download torrent)
92. Lansing, MI - last updated 2-May-2007, 114 transmitters (91.2 MB download torrent)
93. Modesto, CA - last updated 2-May-2007, 88 transmitters (59.6 MB download torrent)
94. Fort Myers, FL - last updated 2-May-2007, 41 transmitters (16.4 MB download torrent)
95. Jackson, MS - last updated 2-May-2007, 46 transmitters (35.3 MB download torrent)
96. Boise City, ID - last updated 2-May-2007, 60 transmitters (36.3 MB download torrent)
97. Madison, WI - last updated 2-May-2007, 80 transmitters (62.5 MB download torrent)
98. Spokane, WA - last updated 7-May-2007, 70 transmitters (45.9 MB download torrent)
99. Pensacola, FL - last updated 7-May-2007, 55 transmitters (27.3 MB download torrent)
100. Canton, OH - last updated 7-May-2007, 103 transmitters (70.5 MB download torrent)
101. Saginaw, MI - last updated 7-May-2007, 64 transmitters (34.0 MB download torrent)
102. Salinas, CA - last updated 7-May-2007, 49 transmitters (27.7 MB download torrent)
103. Santa Barbara, CA - last updated 7-May-2007, 71 transmitters (24.9 MB download torrent)
104. Shreveport, LA - last updated 7-May-2007, 62 transmitters (34.9 MB download torrent)
105. Lafayette, LA - last updated 7-May-2007, 83 transmitters (41.8 MB download torrent)
106. Beaumont, TX - last updated 7-May-2007, 57 transmitters (25.1 MB download torrent)
107. York, PA - last updated 7-May-2007, 98 transmitters (74.5 MB download torrent)
108. Corpus Christi, TX - last updated 7-May-2007, 65 transmitters (23.6 MB download torrent)
109. Reading, PA - last updated 7-May-2007, 131 transmitters (78.2 MB download torrent)
110. Rockford, IL - last updated 7-May-2007, 63 transmitters (40.1 MB download torrent)
111. Provo, UT - last updated 7-May-2007, 403 transmitters (66.2 MB download torrent)
112. Visalia, CA - last updated 7-May-2007, 93 transmitters (45.1 MB download torrent)
113. Biloxi, MS - last updated 7-May-2007, 64 transmitters (39.6 MB download torrent)
114. Davenport, IA - last updated 7-May-2007, 63 transmitters (48.8 MB download torrent)
115. Appleton, WI - last updated 7-May-2007, 39 transmitters (29.8 MB download torrent)
116. Peoria, IL - last updated 7-May-2007, 63 transmitters (56.3 MB download torrent)
117. Huntsville, AL - last updated 7-May-2007, 52 transmitters (28.8 MB download torrent)
118. Hickory, NC - last updated 7-May-2007, 113 transmitters (65.0 MB download torrent)
119. Reno, NV - last updated 7-May-2007, 101 transmitters (29.1 MB download torrent)
120. Brownsville, TX - last updated 7-May-2007, 35 transmitters (15.9 MB download torrent)
121. Montgomery, AL - last updated 7-May-2007, 73 transmitters (50.3 MB download torrent)
122. Springfield, MO - last updated 7-May-2007, 69 transmitters (42.3 MB download torrent)
123. Eugene, OR - last updated 7-May-2007, 134 transmitters (40.5 MB download torrent)
124. Macon, GA - last updated 7-May-2007, 43 transmitters (34.3 MB download torrent)
125. Fort Pierce, FL - last updated 7-May-2007, 46 transmitters (17.7 MB download torrent)
126. Huntington, WV - last updated 7-May-2007, 45 transmitters (25.8 MB download torrent)
127. Killeen, TX - last updated 7-May-2007, 62 transmitters (43.0 MB download torrent)
128. Fayetteville, AR - last updated 7-May-2007, 89 transmitters (44.0 MB download torrent)
129. Fayetteville, NC - last updated 7-May-2007, 84 transmitters (76.7 MB download torrent)
130. Utica, NY - last updated 7-May-2007, 97 transmitters (64.9 MB download torrent)
131. Evansville, IN - last updated 11-May-2007, 40 transmitters (30.4 MB download torrent)
132. New London, CT - last updated 11-May-2007, 102 transmitters (78.3 MB download torrent)
133. Savannah, GA - last updated 11-May-2007, 36 transmitters (20.0 MB download torrent)
134. Tallahassee, FL - last updated 11-May-2007, 64 transmitters (37.2 MB download torrent)
135. Erie, PA - last updated 11-May-2007, 52 transmitters (25.3 MB download torrent)
136. Columbus, GA - last updated 11-May-2007, 46 transmitters (29.7 MB download torrent)
137. South Bend, IN - last updated 11-May-2007, 104 transmitters (83.8 MB download torrent)
138. Anchorage, AK* - last updated 11-May-2007, 84 transmitters (28.6 MB download torrent*)
139. Ocala, FL - last updated 11-May-2007, 86 transmitters (43.7 MB download torrent)
140. Binghamton, NY - last updated 11-May-2007, 121 transmitters (62.4 MB download torrent)
141. Charleston, WV - last updated 11-May-2007, 49 transmitters (26.8 MB download torrent)
142. Fort Collins, CO - last updated 11-May-2007, 122 transmitters (55.1 MB download torrent)
143. Naples, FL - last updated 11-May-2007, 32 transmitters (13.8 MB download torrent)
144. Lincoln, NE - last updated 11-May-2007, 72 transmitters (51.2 MB download torrent)
145. San Luis Obispo, CA - last updated 11-May-2007, 51 transmitters (21.2 MB download torrent)
146. Duluth, MN - last updated 11-May-2007, 47 transmitters (36.1 MB download torrent)
147. Portland, ME - last updated 11-May-2007, 39 transmitters (26.6 MB download torrent)
148. Lubbock, TX - last updated 11-May-2007, 78 transmitters (28.2 MB download torrent)
149. Odessa, TX - last updated 11-May-2007, 59 transmitters (25.6 MB download torrent)
150. Roanoke, VA - last updated 11-May-2007, 66 transmitters (48.2 MB download torrent)
151. Wilmington, NC - last updated 11-May-2007, 47 transmitters (30.1 MB download torrent)
152. Johnstown, PA - last updated 11-May-2007, 94 transmitters (54.9 MB download torrent)
153. Green Bay, WI - last updated 11-May-2007, 30 transmitters (28.4 MB download torrent)
154. Asheville, NC - last updated 11-May-2007, 155 transmitters (67.5 MB download torrent)
155. Yakima, WA - last updated 11-May-2007, 139 transmitters (53.1 MB download torrent)
156. Gainesville, FL - last updated 11-May-2007, 71 transmitters (33.6 MB download torrent)
157. Amarillo, TX - last updated 11-May-2007, 92 transmitters (36.1 MB download torrent)
158. Lynchburg, VA - last updated 11-May-2007, 63 transmitters (40.1 MB download torrent)
159. Waco, TX - last updated 11-May-2007, 75 transmitters (70.0 MB download torrent)
160. Merced, CA - last updated 11-May-2007, 92 transmitters (53.2 MB download torrent)
161. Longview, TX - last updated 11-May-2007, 44 transmitters (36.6 MB download torrent)
162. Fort Smith, AR - last updated 11-May-2007, 59 transmitters (33.6 MB download torrent)
163. Clarksville, TN - last updated 11-May-2007, 67 transmitters (47.7 MB download torrent)
164. Chico, CA - last updated 11-May-2007, 84 transmitters (30.0 MB download torrent)
165. Springfield, IL - last updated 11-May-2007, 49 transmitters (37.2 MB download torrent)
166. Myrtle Beach, SC - last updated 11-May-2007, 65 transmitters (45.8 MB download torrent)
167. Houma, LA - last updated 11-May-2007, 61 transmitters (36.1 MB download torrent)
168. Laredo, TX - last updated 11-May-2007, 16 transmitters ( 7.6 MB download torrent)
169. Richland, WA - last updated 11-May-2007, 105 transmitters (58.1 MB download torrent)
170. Cedar Rapids, IA - last updated 19-May-2007, 48 transmitters (48.0 MB download torrent)
171. Lake Charles, LA - last updated 19-May-2007, 78 transmitters (38.5 MB download torrent)
172. Lafayette, IN - last updated 19-May-2007, 60 transmitters (47.3 MB download torrent)
173. Elkhart, IN - last updated 19-May-2007, 68 transmitters (51.1 MB download torrent)
174. Medford, OR - last updated 19-May-2007, 190 transmitters (45.7 MB download torrent)
175. Champaign, IL - last updated 19-May-2007, 60 transmitters (44.6 MB download torrent)
176. Mansfield, OH - last updated 19-May-2007, 102 transmitters (75.3 MB download torrent)
177. Tyler, TX - last updated 19-May-2007, 35 transmitters (21.8 MB download torrent)
178. Las Cruces, NM - last updated 19-May-2007, 87 transmitters (30.3 MB download torrent)
179. Fargo, ND - last updated 19-May-2007, 29 transmitters (26.3 MB download torrent)
180. Sioux Falls, SD - last updated 19-May-2007, 60 transmitters (53.2 MB download torrent)
181. Fort Walton Beach, FL - last updated 19-May-2007, 89 transmitters (42.5 MB download torrent)
182. Topeka, KS - last updated 19-May-2007, 56 transmitters (50.0 MB download torrent)
183. Burlington, VT - last updated 19-May-2007, 82 transmitters (68.3 MB download torrent)
184. St Cloud, MN - last updated 19-May-2007, 138 transmitters (91.0 MB download torrent)
185. Bellingham, WA - last updated 19-May-2007, 44 transmitters (29.7 MB download torrent)
186. Tuscaloosa, AL - last updated 19-May-2007, 68 transmitters (44.5 MB download torrent)
187. Redding, CA - last updated 19-May-2007, 111 transmitters (36.2 MB download torrent)
188. Barnstable, MA - last updated 19-May-2007, 49 transmitters (39.2 MB download torrent)
189. Benton Harbor, MI - last updated 19-May-2007, 97 transmitters (81.0 MB download torrent)
190. Yuma, AZ - last updated 19-May-2007, 37 transmitters (20.4 MB download torrent)
191. Charlottesville, VA - last updated 19-May-2007, 99 transmitters (48.0 MB download torrent)
192. Jackson, MI - last updated 19-May-2007, 111 transmitters (93.9 MB download torrent)
193. Joplin, MO - last updated 19-May-2007, 81 transmitters (35.5 MB download torrent)
194. Lima, OH - last updated 19-May-2007, 82 transmitters (57.7 MB download torrent)
195. Athens, GA - last updated 19-May-2007, 71 transmitters (41.4 MB download torrent)
196. Wheeling, WV - last updated 19-May-2007, 99 transmitters (56.8 MB download torrent)
197. Bryan, TX - last updated 19-May-2007, 38 transmitters (25.5 MB download torrent)
198. Janesville, WI - last updated 19-May-2007, 89 transmitters (63.2 MB download torrent)
199. Parkersburg, WV - last updated 19-May-2007, 61 transmitters (35.0 MB download torrent)
200. Bloomington, IL - last updated 19-May-2007, 56 transmitters (42.6 MB download torrent)
201. Jacksonville, NC - last updated 19-May-2007, 41 transmitters (29.2 MB download torrent)
202. Terre Haute, IN - last updated 19-May-2007, 78 transmitters (60.2 MB download torrent)
203. Eau Claire, WI - last updated 19-May-2007, 40 transmitters (30.5 MB download torrent)
204. Panama City, FL - last updated 19-May-2007, 57 transmitters (23.8 MB download torrent)
205. Santa Fe, NM - last updated 19-May-2007, 77 transmitters (49.4 MB download torrent)
206. Monroe, LA - last updated 19-May-2007, 57 transmitters (33.5 MB download torrent)
207. Decatur, AL - last updated 19-May-2007, 84 transmitters (55.8 MB download torrent)
208. Rocky Mount, NC - last updated 19-May-2007, 61 transmitters (55.4 MB download torrent)
209. Florence, AL - last updated 19-May-2007, 70 transmitters (28.2 MB download torrent)
210. Punta Gorda, FL - last updated 19-May-2007, 81 transmitters (39.6 MB download torrent)
211. Pueblo, CO - last updated 19-May-2007, 86 transmitters (31.2 MB download torrent)
212. Wichita Falls, TX - last updated 19-May-2007, 72 transmitters (29.9 MB download torrent)
213. Jamestown, NY - last updated 19-May-2007, 70 transmitters (40.2 MB download torrent)
214. Yuba City, CA - last updated 19-May-2007, 89 transmitters (50.5 MB download torrent)
215. Dothan, AL - last updated 19-May-2007, 82 transmitters (38.0 MB download torrent)
216. State College, PA - last updated 19-May-2007, 61 transmitters (29.0 MB download torrent)
217. Columbia, MO - last updated 19-May-2007, 41 transmitters (23.5 MB download torrent)
218. Greenville, NC - last updated 25-May-2007, 60 transmitters (51.0 MB download torrent)
219. Steubenville, OH - last updated 25-May-2007, 94 transmitters (56.2 MB download torrent)
220. Texarkana, AR - last updated 25-May-2007, 47 transmitters (31.1 MB download torrent)
221. Billings, MT - last updated 25-May-2007, 69 transmitters (30.8 MB download torrent)
222. Altoona, PA - last updated 25-May-2007, 69 transmitters (40.3 MB download torrent)
223. Waterloo, IA - last updated 25-May-2007, 51 transmitters (48.3 MB download torrent)
224. La Crosse, WI - last updated 25-May-2007, 49 transmitters (34.5 MB download torrent)
225. Dover, DE - last updated 25-May-2007, 108 transmitters (65.0 MB download torrent)
226. Abilene, TX - last updated 25-May-2007, 63 transmitters (28.1 MB download torrent)
227. Alexandria, LA - last updated 25-May-2007, 77 transmitters (43.2 MB download torrent)
228. Wausau, WI - last updated 25-May-2007, 44 transmitters (33.7 MB download torrent)
229. Florence, SC - last updated 25-May-2007, 62 transmitters (43.0 MB download torrent)
230. Glens Falls, NY - last updated 25-May-2007, 90 transmitters (47.4 MB download torrent)
231. Rochester, MN - last updated 25-May-2007, 62 transmitters (47.0 MB download torrent)
232. Sioux City, IA - last updated 25-May-2007, 57 transmitters (50.3 MB download torrent)
233. Flagstaff, AZ - last updated 25-May-2007, 34 transmitters (19.6 MB download torrent)
234. Albany, GA - last updated 25-May-2007, 83 transmitters (51.3 MB download torrent)
235. Bloomington, IN - last updated 25-May-2007, 79 transmitters (67.2 MB download torrent)
236. Sharon, PA - last updated 25-May-2007, 118 transmitters (78.9 MB download torrent)
237. Williamsport, PA - last updated 25-May-2007, 125 transmitters (54.1 MB download torrent)
238. Muncie, IN - last updated 25-May-2007, 88 transmitters (73.5 MB download torrent)
239. Grand Junction, CO - last updated 25-May-2007, 199 transmitters (39.0 MB download torrent)
240. Auburn, AL - last updated 25-May-2007, 60 transmitters (41.6 MB download torrent)
241. Lawton, OK - last updated 25-May-2007, 97 transmitters (38.4 MB download torrent)
242. Decatur, IL - last updated 25-May-2007, 57 transmitters (41.6 MB download torrent)
243. Goldsboro, NC - last updated 25-May-2007, 78 transmitters (65.3 MB download torrent)
244. Sheboygan, WI - last updated 25-May-2007, 55 transmitters (50.9 MB download torrent)
245. Anniston, AL - last updated 25-May-2007, 60 transmitters (35.3 MB download torrent)
246. Hattiesburg, MS - last updated 25-May-2007, 44 transmitters (18.9 MB download torrent)
247. Iowa City, IA - last updated 25-May-2007, 72 transmitters (60.9 MB download torrent)
248. Sherman, TX - last updated 25-May-2007, 82 transmitters (60.5 MB download torrent)
249. Danville, VA - last updated 25-May-2007, 72 transmitters (58.4 MB download torrent)
250. Jackson, TN - last updated 25-May-2007, 72 transmitters (41.9 MB download torrent)
251. Sumter, SC - last updated 25-May-2007, 49 transmitters (37.4 MB download torrent)
252. San Angelo, TX - last updated 25-May-2007, 52 transmitters (23.1 MB download torrent)
253. Gadsden, AL - last updated 25-May-2007, 82 transmitters (49.8 MB download torrent)
254. St Joseph, MO - last updated 25-May-2007, 40 transmitters (42.9 MB download torrent)
255. Cumberland, MD - last updated 25-May-2007, 101 transmitters (45.0 MB download torrent)
256. Kokomo, IN - last updated 25-May-2007, 60 transmitters (49.6 MB download torrent)
257. Lawrence, KS - last updated 25-May-2007, 56 transmitters (49.9 MB download torrent)
258. Grand Forks, ND - last updated 25-May-2007, 23 transmitters (29.1 MB download torrent)
259. Missoula, MT - last updated 25-May-2007, 68 transmitters (17.8 MB download torrent)
260. Bismarck, ND - last updated 25-May-2007, 28 transmitters (21.7 MB download torrent)
261. Owensboro, KY - last updated 25-May-2007, 54 transmitters (36.5 MB download torrent)
262. Elmira, NY - last updated 4-Jun-2007, 128 transmitters (51.3 MB download torrent)
263. Bangor, ME - last updated 4-Jun-2007, 44 transmitters (28.2 MB download torrent)
264. Lewiston, ME - last updated 4-Jun-2007, 39 transmitters (27.4 MB download torrent)
265. Dubuque, IA - last updated 4-Jun-2007, 59 transmitters (58.8 MB download torrent)
266. Rapid City, SD - last updated 4-Jun-2007, 39 transmitters (30.2 MB download torrent)
267. Pittsfield, MA - last updated 4-Jun-2007, 94 transmitters (65.1 MB download torrent)
268. Pine Bluff, AR - last updated 4-Jun-2007, 37 transmitters (33.6 MB download torrent)
269. Victoria, TX - last updated 4-Jun-2007, 48 transmitters (13.7 MB download torrent)
270. Jonesboro, AR - last updated 4-Jun-2007, 61 transmitters (37.7 MB download torrent)
271. Cheyenne, WY - last updated 4-Jun-2007, 73 transmitters (26.5 MB download torrent)
272. Great Falls, MT - last updated 4-Jun-2007, 46 transmitters (23.0 MB download torrent)
273. Corvallis, OR - last updated 4-Jun-2007, 126 transmitters (62.5 MB download torrent)
274. Pocatello, ID - last updated 4-Jun-2007, 157 transmitters (38.7 MB download torrent)
275. Casper, WY - last updated 4-Jun-2007, 24 transmitters (19.1 MB download torrent)
276. Enid, OK - last updated 4-Jun-2007, 67 transmitters (44.3 MB download torrent)
* The Anchorage coverage maps are not valid because the SRTM terrain data does not extend above 60 degrees north latitude



Change log:

21-Oct-2007
· Fixed broken links

16-Jun-2007
· Updated Las Vegas, Columbus, Charlotte, New Orleans, Salt Lake City, Greensboro, Austin, Nashville, Providence, Raleigh, Hartford, Buffalo, Memphis, West Palm Beach, Jacksonville, Rochester, Grand Rapids, Oklahoma City, Louisville, Richmond, Greenville, Dayton, Fresno, Birmingham, Honolulu, Albany, Tucson, Tulsa, Syracuse, Omaha, Albuquerque, Knoxville, El Paso, Bakersfield, Allentown, Harrisburg, Scranton, Toledo, Baton Rouge, Youngstown, Springfield, Sarasota, Little Rock, McAllen, Stockton, Charleston, Wichita, Mobile, Columbia, Colorado Springs, Fort Wayne, Daytona Beach, Lakeland, Johnson City, Lexington, Augusta, and Melbourne MSAs
· Updates include fixes for some transmitter records, the inclusion of network affiliation in the information balloons, other feature enhancements that have been added in recent weeks, and any updates that have been entered into the FCC database

4-Jun-2007
· Added Elmira, Bangor, Lewiston, Dubuque, Rapid City, Pittsfield, Pine Bluff, Victoria, Jonesboro, Cheyenne, Great Falls, Corvallis, Pocatello, Casper, and Enid MSAs
· Updated New York, Los Angeles, Chicago, Washington Baltimore, San Francisco, Philadelphia, Boston, Detroit, Dallas, Houston, Atlanta, Miami, Seattle, Phoenix, Minneapolis, Cleveland, San Diego, St Louis, Denver, Tampa, Pittsburgh, Portland, Cincinnati, Sacramento, Kansas City, Milwaukee, Orlando, Indianapolis, San Antonio, and Norfolk MSAs
· Updates include fixes for some transmitter records, the inclusion of network affiliation in the information balloons, other feature enhancements that have been added in recent weeks, and any updates that have been entered into the FCC database

25-May-2007
· Added Greenville, Steubenville, Texarkana, Billings, Altoona, Waterloo, La Crosse, Dover, Abilene, Alexandria, Wausau, Florence, Glens Falls, Rochester, Sioux City, Flagstaff, Albany, Bloomington, Sharon, Williamsport, Muncie, Grand Junction, Auburn, Lawton, Decatur, Goldsboro, Sheboygan, Anniston, Hattiesburg MS, Iowa City, Sherman, Danville, Jackson, Sumter, San Angelo, Gadsden, St Joseph, Cumberland, Kokomo, Lawrence, Grand Forks, Missoula, Bismarck, and Owensboro MSAs

19-May-2007
· Added Cedar Rapids, Lake Charles, Lafayette, Elkhart, Medford, Champaign, Mansfield, Tyler, Las Cruces, Fargo, Sioux Falls, Fort Walton Beach, Topeka, Burlington, St. Cloud, Bellingham, Tuscaloosa, Redding, Barnstable, Benton Harbor, Yuma, Charlottesville, Jackson, Joplin, Lima, Athens, Wheeling, Bryan, Janesville, Parkersburg, Bloomington, Jacksonville, Terre Haute, Eau Claire, Panama City, Santa Fe, Monroe, Decatur, Rocky Mount, Florence, Punta Gorda, Pueblo, Wichita Falls, Jamestown, Yuba City, Dothan, State College, and Columbia MSAs

11-May-2007
· Added Evansville, New London, Savannah, Tallahassee, Erie, Columbus, South Bend, Anchorage, Ocala, Binghamton, Charleston, Fort Collins, Naples, Lincoln, San Luis Obispo, Duluth, Portland, Lubbock, Odessa, Roanoke, Wilmington, Johnstown, Green Bay, Asheville, Yakima, Gainesville, Amarillo, Lynchburg, Waco, Merced, Longview, Fort Smith, Clarksville, Chico, Springfield, Myrtle Beach, Houma, Laredo, and Richland MSAs

7-May-2007
· Added Spokane, Pensacola, Canton, Saginaw, Salinas, Santa Barbara, Shreveport, Lafayette, Beaumont, York, Corpus Christi, Reading, Rockford, Provo, Visalia, Biloxi, Davenport, Appleton, Peoria, Huntsville, Hickory, Reno, Brownsville, Montgomery, Springfield, Eugene, Macon, Fort Pierce, Huntington, Killeen, Fayetteville AR, Fayetteville NC, and Utica MSAs

2-May-2007
· Added Daytona Beach, Lakeland, Johnson City, Lexington, Augusta, Melbourne, Lancaster, Chattanooga, Des Moines, Kalamazoo, Lansing, Modesto, Fort Myers, Jackson, Boise City, and Madison MSAs
· Harrisburg_PA.kmz had a corrupted coverage map overlay for WHP-DT, so a fixed version of the file has been posted. If you have a corrupted version of the file, please delete it and download the fully working version. Torrent seeders should also delete the old torrent+data and get the new one.

28-Apr-2007
· Added Allentown, Harrisburg, Scranton, Toledo, Baton Rouge, Youngstown, Springfield, Sarasota, Little Rock, McAllen, Stockton, Charleston, Wichita, Mobile, Columbia, Colorado Springs, and Fort Wayne MSAs

26-Apr-2007
· Added Greenville, Dayton, Fresno, Birmingham, Honolulu, Albany, Tucson, Tulsa, Syracuse, Omaha, Albuquerque, Knoxville, El Paso, and Bakersfield MSAs

19-Apr-2007
· Added Austin, Nashville, Providence, Raleigh, Hartford, Buffalo, Memphis, West Palm Beach, Jacksonville, Rochester, Grand Rapids, Oklahoma City, Louisville, and Richmond MSAs

16-Apr-2007
· Added Las Vegas, Columbus, Charlotte, New Orleans, Salt Lake City, and Greensboro MSAs
· Fixed callsign parsing such that some previously missed transmitters are now included

11-Apr-2007
· Added Pittsburgh, Portland, Cincinnati, Sacramento, Kansas City, Milwaukee, Orlando, Indianapolis, San Antonio, and Norfolk MSAs.

6-Apr-2007
· Fixed bug causing several transmitters to be left out of each set. For all the latest, please download the file(s) again.
· Added Atlanta, Miami-Ft. Lauderdale, Seattle, Phoenix, Minneapolis-St. Paul, Cleveland, San Diego, St. Louis, Denver, and Tampa MSAs.
· Dallas_FtWorth filenames have been shortened to just Dallas.
· MSA centroids have been re-defined according to US Census Bureau standards, so the included set of transmitters per metro may have changed.

30-Mar-2007
· Added Houston MSA

29-Mar-2007
· Updated Chicago with new enhancements and some additional transmitters
· Added Washington-Baltimore, San Francisco, Philadelphia, Boston, Detroit, and Dallas-Ft. Worth MSAs.

28-Mar-2007
· Added New York and Los Angeles packages. Chicago package remains the same (to be updated soon).
· Clicking on a transmitter icon now brings up a balloon filled with key vitals and a link to the FCC. Any packages released after today should include this enhancement.



About the maps:
  • They DO take into account the transmitter power, antenna pattern, and height (according to the FCC)
  • They DO account for propagation losses due to terrain
  • They DO account for curvature of the Earth
  • They represent the expected signal strength near ground level
  • They DO NOT take into account your antenna gain, amps, elevated installation, or receiver sensitivity
  • They DO NOT account for building obstructions or indoor penetration
  • They DO NOT account for multipath


    In very rough terms, the colors can be broken down as follows (not related to Antennaweb):

    - White is extremely strong. Beware of signal overload on amps.
    - Red-yellow-green are all quite strong. You can expect reasonable coverage with an indoor antenna.
    - Cyan is where it's advisable to move the antenna up to the second floor or attic.
    - Blue is where it's probably necessary to install a good antenna on the roof.
    - Purple is quite weak and you really have to work at it for any chance of reception.

    Please understand that this is a simulation and can only be treated as a rough approximation. Reception at your location is affected by many factors such as multipath, antenna gain, receiver sensitivity, buildings, and trees - which are not taken into account. Your mileage may vary.


Additional comments:
  • The coverage maps are not initially turned on when the file is loaded. You need to expand the folders to select the coverage maps to view.

  • The terrain variations are easier to see if you set the terrain exaggeration to 3 (max) in the Google Earth options.

  • FYI, the standard coverage maps are created with roughly 500 meter resolution at ground level. In order to truly understand the reception issues at a particular location (e.g., the roof of your house), it's better to look at an analysis such as a radar plot since it is simulated at much higher resolution and is specific to a location in 3D space (lat, lon, and height). On a single page, you can simultaneously see the signal strength of all nearby channels for your exact location.

  • If you notice any errors, please let me know. If any data has been incorrectly extracted from the FCC database, they should be corrected for future simulations.


Best regards,
Andy
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Old 03-26-2007, 06:15 AM
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Great idea.
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Old 03-26-2007, 11:24 PM
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This is a terrific addition to GoogleEarth...although it would help if the display box listed
the real channel number...and maybe ERP...and a link to FCC dB....

At first glance, looks okay for L.A., Riverside, San Diego & Tijuana.

However, I couldn't find K47FL in FCC TVQ database.
(Colocated with KDUG-LP, a few miles NE of Murrietta, CA).

Historic Call Search feature in www.fccinfo.com revealed K47FL to be K12PO,
which is in the FCC database.

FYI: My son receives K12PO (on CH12) as a low power repeater for San Diego's KUSI,
so I'm familiar with it's location....thankfully in VHF band, cuz it would overload his UHF Preamp....

This shotgun approach to station location is a real pain.....
At least we can now readily see where these potential problems are located.....
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Old 03-26-2007, 11:54 PM
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Nice. I had been using Google Earth to map the transmitters in my area. Assuming yours is accurate, it is apparent that I suck at the Internet. KIMT and KYIN for example - I had both transmitters marked but one as KIMT and the other as KYIN, whereas your list has one marked as their digital transmitters and the other for their analog.

There are a LOT of transmitters marked in the file. I would advise those with slightly slower machines or with less than 1GB of memory to not turn on the listing until you zoom in to your general area first. Makes things much quicker.

Thanks for making the file available!

I stole your sig.
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Old 03-27-2007, 02:01 AM
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Perhaps break it up into ten different sections???
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Old 03-27-2007, 06:58 PM
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Looks great. From what I know about VA : tidewater, NoVa, SW all work.
Thanks for all the effort.
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Old 03-27-2007, 08:26 PM
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Great idea, and thanks for putting it together.
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Old 03-28-2007, 02:19 AM - Thread Starter
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Quote:
Originally Posted by holl_ands View Post

...it would help if the display box listed the real channel number...and maybe ERP...and a link to FCC dB....

That's a great idea! Consider it done in the next update.



Quote:


However, I couldn't find K47FL in FCC TVQ database. (Colocated with KDUG-LP, a few miles NE of Murrietta, CA).

Historic Call Search feature in www.fccinfo.com revealed K47FL to be K12PO, which is in the FCC database.

Thanks for catching this!

I looked into this and in order to fix it, I would need to pull in the FCC's call sign tracking database, which I do not currently do. Apparently, the callsign database gets updated without corresponding indicators in all the other databases, so I'll need to do an extra level of cross-referencing to get the real callsign. For now, it means that any callsigns that have been renamed since the last recorded transmitter application (license, construction permit, STA, etc.) will have it's old callsign instead of the latest one. This will go on the to-do list pending other changes I have in the works.



Quote:


This shotgun approach to station location is a real pain.....
At least we can now readily see where these potential problems are located.....

The next file will have the callsigns sorted in alphabetical order. At least that will make it easier to locate a specific channel.



Best regards,
Andy
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Old 03-28-2007, 02:34 AM - Thread Starter
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Quote:
Originally Posted by holl_ands View Post

Perhaps break it up into ten different sections???

I think I'll follow a plan of making coverage maps (plus transmitter icons) for the major MSAs. This would let people pick the specific transmitters and maps for their area without having to view all the transmitters at one time.

I will probably still maintain the nation-wide transmitter-only file for those people who don't need the maps since that file is small by itself. In regards to making multiple regional versions, I'll have to think about it some more. For now my energy is focused on improving the map generation software.

If you have any great ideas about how the nation-wide database should be split, please let me know.

Best regards,
Andy
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Old 03-28-2007, 02:51 AM - Thread Starter
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Quote:
Originally Posted by dbsc View Post

KIMT and KYIN for example - I had both transmitters marked but one as KIMT and the other as KYIN, whereas your list has one marked as their digital transmitters and the other for their analog.

I wouldn't necessarily assume my data is correct because all I do is snarf the FCC's database from their web site. The FCC database are full of little mistakes, missing data, and multiple records per callsign (with no clear way of telling which one is actually the correct one), so my software has to make several assumptions and "guess" which records to believe and use. It's always good to check against more definitive sources (like talking to the broadcast engineer) to fix any errors.

If anyone reports corrections back to me, I will add it to my set of FCC "overrides" so that all future output will use the fixed data (all my tools use the same TV database parsing routines -- transmitter lists, coverage maps, radar plots, etc.).

Best regards,
Andy
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Old 03-28-2007, 09:19 PM
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Quote:
Originally Posted by andy.s.lee View Post

...

If you have any great ideas about how the nation-wide database should be split, please let me know.

Best regards,
Andy

What about splitting by station class: full power analog & digital, Class A & LP, and then translators as a third layer.
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Old 03-28-2007, 09:58 PM
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Quote:
Originally Posted by CHeath View Post

What about splitting by station class: full power analog & digital, Class A & LP, and then translators as a third layer.

Analog and digital should be distinct. Some people are looking for digital-only, and others are looking for analog-only (until 2009 anyway). Aside from that the maintainer of the file won't have to make another special release just because the analogs get shut off.

I stole your sig.
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Old 03-29-2007, 01:42 AM - Thread Starter
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Thanks everyone for all the great comments and suggestions. Just so you know, I've revised Post #2 to include new packages for New York and Los Angeles coverage maps.

Have fun!

Best regards,
Andy
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Old 03-29-2007, 10:04 AM
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Quote:
Originally Posted by andy.s.lee View Post

Thanks everyone for all the great comments and suggestions. Just so you know, I've revised Post #2 to include new packages for New York and Los Angeles coverage maps.

Have fun!

Best regards,
Andy

Hi Andy,

Nice. Check your private messages; I'd be happy to host the Chicago DMA one. Could you send it to me (read your PM I sent ya). Thanks for doing this! Can I put in a request for Rockford and Milwaukee? Rockford won't take long.

Gilbert
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Old 03-29-2007, 10:19 AM - Thread Starter
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Quote:
Originally Posted by sebenste View Post

Hi Andy,

Nice. Check your private messages; I'd be happy to host the Chicago DMA one. Could you send it to me (read your PM I sent ya). Thanks for doing this! Can I put in a request for Rockford and Milwaukee? Rockford won't take long.

Gilbert,

I sent the Chicago file (from last week, not the new one I'm about to post) to your email address already. It should have been in your inbox on Monday. If you didn't receive it, I wonder if it was because of the 14 MB attachment.

When the updated Chicago file is ready, I'll send it to the same address, but this time the file will be even bigger. If you have any alternative places to send the file, I can try that too. If all else fails, you can always try downloading it via BiTorrent.

I think the new Chicago file will be ready tonight, so I'll give it a try.

Best regards,
Andy
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Old 03-29-2007, 12:33 PM
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Quote:
Originally Posted by andy.s.lee View Post

Gilbert,

I sent the Chicago file (from last week, not the new one I'm about to post) to your email address already. It should have been in your inbox on Monday. If you didn't receive it, I wonder if it was because of the 14 MB attachment.

When the updated Chicago file is ready, I'll send it to the same address, but this time the file will be even bigger. If you have any alternative places to send the file, I can try that too. If all else fails, you can always try downloading it via BiTorrent.

I think the new Chicago file will be ready tonight, so I'll give it a try.

Best regards,
Andy

Looks like my spamcatcher ate it. I sent you a private PM. Thanks for doing this!

Gilbert
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Old 03-30-2007, 05:44 PM - Thread Starter
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FYI, the top 10 MSA coverage maps have been made available in post #2 . I also took the liberty of updating the FCC database in post #1 to include today's FCC data (3/30) plus the added transmitter data in the pop-up balloon when an icon is clicked.

Best regards,
Andy
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Old 03-31-2007, 09:21 AM
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Very, very cool stuff here. Thanks for putting it together!

I was looking at the Washington-Baltimore kmz file and it is missing a number of local stations such WTTG-DT Fox 5 (DT 36) and WUSA-DT CBS 9 (DT 34) both at 1000 kW. Was this intended to be a sample list of selected stations? Or were they overlooked when extracting stations from the FCC database?

I see what appears to be a typo entry: WJAL (DT 39) which looks to be an old lower power entry for WJLA-DT ABC 7 (DT 39) which is currently at 1000 kW. WDCA 50 has changed it's call letters to WDCW CW 50, but obviously changing call letters makes it hard to track through the database.

WHUT-DT PBS 32 (DT 33) is in the FCC database and is authorized to go at 100 kW, but is not on the air digitally - at all However, it should be included so people can see the reception map for it whenever it finally does go live.

Digital stations that I see missing from the DC-Baltimore list:
WMPB MPT 67, DT=29 Baltimore
WUSA CBS 9, DT=34 Washington
WTTG Fox 5, DT=36, Washington
WNUV CW 54, DT=40, Baltimore
WUTB MNT 24, DT=41, Baltimore <-- Station is still at STA power of 530 watts, love to see the coverage map for 530 watts.
WMPT MPT 22, DT=42, Annapolis or Owings Mills, MD
WPXW Ion/Pax 66, DT=43, Manassas, VA
WWPB MPT 31, DT=44, Hagerstown, MD (may not fall into the DMA)
WBFF Fox 45, DT=46, Baltimore
WNVC Mhz 57, DT=57, Fairfax, VA

You can also check the 1st post in the Washington-Baltimore thread for a list of the digital stations in the area, so maybe my list is redundant. There are enough people who live in the fringes of the greater Washington-Baltimore area that these maps will be very useful. Again, thanks for going to the trouble to do this!!!
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Old 03-31-2007, 10:09 AM
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Thanks for the Philly area. I second the very, very cool stuff comment.

- Can you explain the color mapping, e.g. what are the signal levels for each color and units (dBuV)?
- Can you give some insight as to how you processed the database?

Some missing digital stations:
WNJS-DT, channel 22, 197 kW, HAAT = 266 m, Camden NJ (east of Philadelphia)
WNJT-DT, channel 43, 46 kW, HAAT = 46m, Trenton NJ (northeast of Philadelphia)

We're using a 100 km radius for Philadelphia area local coverage. The FCC query: http://www.fcc.gov/fcc-bin/tvq?state...lon2=51&size=9
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Old 04-01-2007, 04:37 AM - Thread Starter
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Quote:
Originally Posted by afiggatt View Post

I was looking at the Washington-Baltimore kmz file and it is missing a number of local stations such WTTG-DT Fox 5 (DT 36) and WUSA-DT CBS 9 (DT 34) both at 1000 kW. Was this intended to be a sample list of selected stations? Or were they overlooked when extracting stations from the FCC database?

I see what appears to be a typo entry: WJAL (DT 39) which looks to be an old lower power entry for WJLA-DT ABC 7 (DT 39) which is currently at 1000 kW. WDCA 50 has changed it's call letters to WDCW CW 50, but obviously changing call letters makes it hard to track through the database.

WHUT-DT PBS 32 (DT 33) is in the FCC database and is authorized to go at 100 kW, but is not on the air digitally - at all However, it should be included so people can see the reception map for it whenever it finally does go live.

Digital stations that I see missing from the DC-Baltimore list:
WMPB MPT 67, DT=29 Baltimore
WUSA CBS 9, DT=34 Washington
WTTG Fox 5, DT=36, Washington
WNUV CW 54, DT=40, Baltimore
WUTB MNT 24, DT=41, Baltimore <-- Station is still at STA power of 530 watts, love to see the coverage map for 530 watts.
WMPT MPT 22, DT=42, Annapolis or Owings Mills, MD
WPXW Ion/Pax 66, DT=43, Manassas, VA
WWPB MPT 31, DT=44, Hagerstown, MD (may not fall into the DMA)
WBFF Fox 45, DT=46, Baltimore
WNVC Mhz 57, DT=57, Fairfax, VA

You can also check the 1st post in the Washington-Baltimore thread for a list of the digital stations in the area, so maybe my list is redundant. There are enough people who live in the fringes of the greater Washington-Baltimore area that these maps will be very useful. Again, thanks for going to the trouble to do this!!!

It looks like most, if not all, of the missing transmitters you're reporting are due to a bug in my code. My analysis shows that about 800 transmitters (out of about 13,000) were being omitted at a particular stage in the processing, causing them to be left out of the final MSA package. I've corrected the problem, but I'll need to re-process the metros and post new files.

For the changed callsigns that you mentioned, it looks like both old and new callsigns are entered and still marked valid in the FCC database. I will leave both old and new callsigns in the file for now since it looks like there are substantially different transmitter specifications for some of them. Until I can figure out how to properly filter out the invalid entries, I'll continue to include all records marked as "current" in the FCC database.

I'll post a new set of files in a couple of days (mostly due to processing time), so I hope you'll be able to check the new file once it's available. The FCC database ftp site also seems to be down at the moment.

I'm also putting in the "override" for WUTB at 530 Watts. Their STA is 5 years old! If you find out that they've gone to full power, please let me know so that I can revise my collection of FCC database "patches".



Thanks for uncovering all these errors! Please check back for updates in a few days.



Best regards,
Andy
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Old 04-01-2007, 09:14 AM - Thread Starter
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Quote:
Originally Posted by GeekGirl View Post

- Can you explain the color mapping, e.g. what are the signal levels for each color and units (dBuV)?

Since I use a more conservative version of Longley-Rice propagation than the FCC, I can't give a direct mapping to the FCC's levels. FYI, in the L-R models, I use F(99,99) as opposed to F(50,90), used by the FCC (if you don't do any RF modeling, then you don't need to care about this). I hope that the following three-part answer will help a little in understanding the maps.

1) If you're comparing these maps with the FCC's contour maps, then the UHF DTV 41 dBu curve will be right around the cyan colored band. For high VHF, the FCC's DTV 36 dBu curve should be between the cyan and green bands. For low VHF, the FCC's DTV 28 dBu curve should be right around the green band. I think you'll find these levels match the FCC service contours pretty well, except that these maps follow the terrain details more accurately.

2) If you're interested in estimating OTA reception ease/difficulty, I'd roughly break it down into the following groups. White-red-yellow-green are all quite strong and I would expect reasonable indoor coverage. Cyan is where it's advisable to move the antenna up to the second floor or attic. Blue is where it's probably necessary to install a good antenna on the roof. Purple is quite weak and is where DXers or dedicated OTA enthusiasts need to work at getting their signal. Of course, these are very rough estimates since multipath, antenna gain, receiver sensitivity, buildings, trees, and other effects are not factored into the simulation.

3) Technically, the maps represent signal levels about 15 to 20 dB lower than what the FCC uses because of the difference in modeling parameters. My own test experience has shown that the FCC modeling parameters are too optimistic, and other "experts" and organizations have come to similar conclusions as well. I've found the F(99,99) parameters to track reality much better. In the end, this doesn't make all that much difference (other than a level shift) because even if the FCC used the same modeling parameters, they simply would have selected a different threshold value (e.g., instead of 41 dBu, they might have used 25 dBu).



Quote:


- Can you give some insight as to how you processed the database?

I download the CDBS files from the FCC web (or ftp) site. That comes as several individual files that "sort-of" make a relational database. I parse those files, making the necessary cross-references, and then try to extract the records that I believe are the best representation of the real world. The hueristics for guessing the right records is the tricky part since many transmitters have multiple records and there's limited information available about things like STA extension dates, construction dates, etc.

The two key pieces that come out of the CDBS files are 1) transmitter details (i.e., channel, power, height, antenna rotation, etc.), and 2) the antenna pattern used.

<<< off-topic alert >>>
BTW, it's an often overlooked fact that many coordinates in the FCC database are specified in NAD27 coordinates instead of WGS84. If the coordinates are not converted, this could lead to position errors of up to a couple hundred meters depending on location.
<<< end off-topic alert >>>



Quote:


Some missing digital stations:
WNJS-DT, channel 22, 197 kW, HAAT = 266 m, Camden NJ (east of Philadelphia)
WNJT-DT, channel 43, 46 kW, HAAT = 46m, Trenton NJ (northeast of Philadelphia)

We're using a 100 km radius for Philadelphia area local coverage. The FCC query: http://www.fcc.gov/fcc-bin/tvq?state...lon2=51&size=9

I believe the missing stations are due to a bug recently discovered. See my earlier post for a bit more of an explanation. Check back in a couple days and I'll probably have a new set of files available that fix the oversight.



Best regards,
Andy
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Old 04-01-2007, 11:38 AM
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I tried to download your file and Google Earth is giving me a permission denied error when I try to open it, any ideas? I'm using XP, logged in with Admin rights.

Matt
Please don't PM me with technical questions that should be posted in the forum.
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Old 04-01-2007, 12:04 PM
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any ideas? I'm using XP

"fdisk".

But seriously, when one OS doesn't do what you want it to do having a dual (or triple or quad or more) boot system is very useful.

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Old 04-01-2007, 12:11 PM
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I tried to download your file and Google Earth is giving me a permission denied error when I try to open it, any ideas? I'm using XP, logged in with Admin rights.

Hey Matt. It will probably help you get your question answered if you were to specify which file you were trying to load into Google Earth.

Rudy

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Old 04-01-2007, 02:01 PM
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mjones73 - The error message is not correct, it's a path problem and can't find the file. I had the same problem with the transmitter file from Post #1.

Put the .kmz file into Google Earth's default folder, e.g. c:\\Program Files\\Google\\Google Earth\\ and in "My Documents". One of those 2 folders is the correct one- will sort that out later. Restart, problem gone (fingers crossed).

Update: After you open the .kmz file, it goes to the "Temporary Places" folder. Right-click on the "Temporary Places" folder and select "Save to My Places." To make it permanent, select File-> Save My Places. This will save everything to the default "My Places" folder: C:\\Documents and Settings\\\\Application Data\\Google\\GoogleEarth.
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Old 04-01-2007, 02:26 PM
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mjones73 - The error message is not correct, it's a path problem and can't find the file.

So that's what that was. After I got a similar message I just went to File->Open and it worked that way.

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Old 04-01-2007, 04:02 PM
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Originally Posted by andy.s.lee View Post

I'll post a new set of files in a couple of days (mostly due to processing time), so I hope you'll be able to check the new file once it's available. The FCC database ftp site also seems to be down at the moment.

I'm also putting in the "override" for WUTB at 530 Watts. Their STA is 5 years old! If you find out that they've gone to full power, please let me know so that I can revise my collection of FCC database "patches".

Thanks for uncovering all these errors! Please check back for updates in a few days.

Does the FCC periodically clean up it's database? It seems we still have quite a few stations out there that have gone the their full licensed power on their digital signal, but the STA entry is still there. Or is updating the database for STA vs licensed power a responsibility of the broadcast station?

If you know a station is still at STA, but there is also a full power spec for it, have you thought about providing two entries for that digital station? One with the call sign with a STA (WXYZ-DT (36) STA) notation, the other entry with the call sign with a CP or Full Power notation. A lot of work, I'm sure, and probably confusing to some. But potentially useful to someone who is looking at whether they can get the station at STA power and what antenna they would need to get the station when it does go full power.

If you are looking to update the database, in the DC-Baltimore DMA, I know of only three stations (other than LPs or TXs) that have not gone full power on the digital signal:

WUTB-DT My 24 (41) in Baltimore - still at 530 watts STA. The word is that they will go full power in May (maybe). The station recently started to send out a 720p signal, but everything is SD and stretched to 16:9! Why the FCC allowed them to delay boosting their power this long beyond the July, 2006 deadline escapes me. It is a Fox owned station, they can't claim poverty. No tower permit problem that I have heard of.
WHUT-DT PBS / Howard University 32 (33) - not on the air, but has had authorization for years to go on the air at 100 kW. No word at all, when they will start broadcasting digitally.
WHAG-DT NBC 25 (55) in Hagerstown, MD. Still at 0.9 kW, owned by Nexstar broadcasting which asked the FCC if it could delay going full power for WHAG-DT until the fall of 2008!

Also, WETA-DT PBS 26 (27) is currently broadcasting from Arlington, VA. It is to move to the same tower as WUSA-DT, WJLA-DT in NW DC with an increase in height and power to 90 kW. Another case where it would be useful to have both locations shown on the map so people can see what the signal reception areas should be after WETA-DT moves. But again, possibly confusing and more work.

Thanks again for al the work you are putting into this!
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Old 04-01-2007, 04:14 PM
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FCC Reference URLs (for those reading this thread who want more info):
FM and TV Service Contours: http://www.fcc.gov/ftp/Bureaus/MB/Da...ta/readme.html
FM and TV Propagation Curves: http://www.fcc.gov/mb/audio/bickel/curves.html
Antenna Height Above Average Terrain (HAAT) Calculator: http://www.fcc.gov/mb/audio/bickel/haat_calculator.html
CDBS database: http://www.fcc.gov/mb/databases/

Andy-
Quote:


Since I use a more conservative version of Longley-Rice propagation... I use F(99,99) as opposed to F(50,90)...(if you don't do any RF modeling, then you don't need to care about this).

As a matter of fact, I do work with RF propagation models, but not in commercial broadcast. I understand that the FCC L-R model is somewhat antiquated. Do you use HAAT directly or some other height in your model?

Quote:


2) If you're interested in estimating OTA reception ease/difficulty, I'd roughly break it down into the following groups. White-red-yellow-green are all quite strong... Cyan ...move the antenna up... Blue ... antenna on the roof. Purple...weak.

One of the commenters in the Philly OTA thread mentioned that your colors roughly match the http://antennaweb.org color map. I can't verify right now since the site is down.

Your info is very informative and appreciated. Thanks for doing this.
(Suggestion: Put your location in your user profile. It's very helpful to know where your "local" home is.)
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Old 04-01-2007, 06:24 PM - Thread Starter
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Quote:
Originally Posted by afiggatt View Post

Does the FCC periodically clean up it's database? It seems we still have quite a few stations out there that have gone the their full licensed power on their digital signal, but the STA entry is still there. Or is updating the database for STA vs licensed power a responsibility of the broadcast station?

If you know a station is still at STA, but there is also a full power spec for it, have you thought about providing two entries for that digital station? One with the call sign with a STA (WXYZ-DT (36) STA) notation, the other entry with the call sign with a CP or Full Power notation. A lot of work, I'm sure, and probably confusing to some. But potentially useful to someone who is looking at whether they can get the station at STA power and what antenna they would need to get the station when it does go full power.

Officially, STAs are supposed to last for 180 days from the date of issue. The only way to continue using the STA is to get renewals. The CDBS files contain some information about "last updated" dates for each record, but that information does not seem to be maintained for all cases. When trying to identify the "correct" record for each broadcaster, I look at STA expiration dates, CP and LIC grant dates, "current" or "archive" flags, and other hints from the database that clue me in on which records are most likely to match reality.

It does look like old records in the database get cleaned up from time to time. Many transmitters have had several (sometimes over a dozen) records filed over the last few decades, yet only the more recent records (usually no more than about 3) are flagged as "current".

For now, I think the best thing to do is just maintain one active record per transmitter (as opposed to keeping all the possible flavors). It seems that in the majority of the cases, I'm getting the correct record, and for each of the cases I'm not, I can simply enter an "override" to get the correct entry. Once we figure out where all the "exception" cases are, we should end up with something that is a pretty close match to the current real-world snapshot of the RF environment.



Quote:


If you are looking to update the database, in the DC-Baltimore DMA, I know of only three stations (other than LPs or TXs) that have not gone full power on the digital signal:

WUTB-DT My 24 (41) in Baltimore - still at 530 watts STA. The word is that they will go full power in May (maybe). The station recently started to send out a 720p signal, but everything is SD and stretched to 16:9! Why the FCC allowed them to delay boosting their power this long beyond the July, 2006 deadline escapes me. It is a Fox owned station, they can't claim poverty. No tower permit problem that I have heard of.
WHUT-DT PBS / Howard University 32 (33) - not on the air, but has had authorization for years to go on the air at 100 kW. No word at all, when they will start broadcasting digitally.
WHAG-DT NBC 25 (55) in Hagerstown, MD. Still at 0.9 kW, owned by Nexstar broadcasting which asked the FCC if it could delay going full power for WHAG-DT until the fall of 2008!

Also, WETA-DT PBS 26 (27) is currently broadcasting from Arlington, VA. It is to move to the same tower as WUSA-DT, WJLA-DT in NW DC with an increase in height and power to 90 kW. Another case where it would be useful to have both locations shown on the map so people can see what the signal reception areas should be after WETA-DT moves. But again, possibly confusing and more work.

The fixed set of files is processing as we speak, so we'll have to double check on these when the new files are available.

I think this will have to be an iterative process. Although it might not be totally right each time, I hope we're getting closer on each pass. The maps need to be refreshed occasionally anyway, just to keep up with changes in the FCC database, so any "overrides" we put in along the way will make each iteration of the files that much better!



Thanks again for keeping an eye out for details. Please keep up the work on checking the results. We'll all end up with better results with everyone's combined diligence.



Best regards,
Andy
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