ASPRS Positional Accuracy Standards for Digital Geospatial Data

摘要

National Map Accuracy Standard (NMAS), U.S. Bureau of the Budget, 1947. …90% of points within 1130th of an inch horizontal at published map scale for 1:20000 and larger scale maps; vertical accuracies within 1/2 contour interval. Photogrammetry for Highways Committee, 1968 Similar to NMAS, but upgraded for larger scale/higher accuracy transportation mapping work: 90% of points within 1/40" at published scale; spot elevation accuracies at 1/4 the contour interval.