Number of towers and Location Data Quality: Although all duplicate latitude/longitudes were deleted to come up with unique tower locations, if slight differences existed in reported latitude/longitude for the different antennas on a tower, then they may appear to be another unique tower. The contractor was not able to confirm a majority of the records using orthophotos and USGS maps as described above. This may be because the orthophotos used in the visual confirmation were from before the tower was erected or because the reported latitude and longitude placed the tower incorrectly on the map.