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 . Vertical tests are run locate X in relation to known land- an inch ( centimeters) on the map.
publishes maps and other products at high levels of accuracy. Dependability is vital, for example, to engineers, highway ... the outline is shown in general form. At Map Accuracy Standards U.S. Department of the Interior U.S. Geological Survey USGS Fact Sheet 171-99 November 1999.
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