Calculating Your Map Accuracy Using US National Map Accuracy Standards

Many people would like to assess the accuracy standards for mapping products. In the United States, standards for accuracy assessment have been developed.

The National Map Accuracy Standard (NMAS) provides insurance that maps conform to established accuracy specifications, thereby providing consistency and confidence in their use in geospatial applications.

The following information from the USGS National Geospatial Program Standards Web sitegenerally describes the NMAS.

With a view to the utmost economy and ease in producing maps which fulfill not …