Goto Section: 80.755 | 80.759 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 80.757 Topographical data.
(a) In the preparation of profile graphs and in determining the
location and height above sea level of the antenna site, the elevations
or contour intervals must be taken from U.S. Geological Survey
topographic quadrangle maps, U.S. Army Corps of Engineers maps or
Tennessee Valley Authority maps, whichever is the latest, for all areas
for which maps are available. If such maps are not published for the
area in question, the next best topographic information must be used.
The maps used must include the principal area to be served. U.S.
Geological Survey topographic quadrangle maps may be obtained from the
Eastern Distribution Branch, U.S. Geological Survey, 1200 South Eads
Street, Arlington, VA 22202, for maps of areas east of the Mississippi
River, including Minnesota, Puerto Rico, and the Virgin Islands, and
from the Western Distribution Branch, U.S. Geological Survey, Federal
Center, Denver CO 80225, for maps of areas west of the Mississippi
River, including Alaska, Hawaii, Louisiana, Guam and American Samoa.
Sectional aeronautical charts are available from the Distribution
Division, National Ocean Service, Riverdale, MD 20840.
(b) In lieu of maps, the average terrain elevation may be computer
generated, using elevations from a 30 second point or better
topographic data file such as those available for the U.S. Geological
Survey's National Geographic Information Center or the National Oceanic
and Atmospheric Administration's National Geophysical Data Center. In
case of dispute maps will be used to determine the correct value.
Goto Section: 80.755 | 80.759
Goto Year: 2020 |
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