Transcription of Map Accuracy Standards - USGS
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Map Accuracy Standards - USGS
Map Accuracy Standards As applied to the USGS positions from aerial photographs. Field Map Accuracy quadrangle topographic map, the hori- survey methods are the only tests An inaccurate map is not a reliable map. zontal Accuracy standard requires that the accepted for official Accuracy testing. X may mark the spot where the trea- positions of 90 percent of all points Positions must be obtained by surveys of sure is buried, but unless the seeker can tested must be accurate within 1/50th of a higher Accuracy .
revised several times, and the current version was issued in 1947. (The stan-dards are printed on the reverse of this factsheet.) As applied to the USGS 7.5-minute quadrangle topographic map, the hori-zontal accuracy standard requires that the positions of 90 percent of all points tested must be accurate within 1/50th of
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