The United States Territories. Map of the 39th Parallel Arc.

American Congress on Surveying and Mapping (ACSM)

The American Congress on Surveying and Mapping (ACSM) was formed in 1941 to better coordinate the nation's surveying and mapping activities. The cartographers, geodesists, surveyors, and other spatial data information professionals who participate in the four member organizations of ACSM work in both the public and private sectors. These professionals make the Earth's geospatial information more easily understood through the plats, charts, maps, and digital cartographic and related data systems they provide.

Member Organizations of ACSM

American Association for Geodetic Surveying (AAGS): Geodesy is the art and science that uses mathematical and scientific determinations to express the figure and size of the Earth. It has been used throughout history to define the position of objects and living beings on the Earth's surface.

Cartography and Geographic Information Society (CaGIS): Cartography is the art and science of expressing graphically the physical features of the Earth. Cartographic products such as maps and charts can express virtually any subject within a geographic context.

Geographic and Land Information Society (GLIS): Geographic and Land Information Systems are a digital compilation of various data about, in general, parcels of land, and towns, cities, and counties. These systems provide critical information to emergency personnel, landowners, and land planners.

Logo for NSPSNational Society of Professional Surveyors (NSPS): Surveying is the art and science of combining precise measurement with evidence analysis to represent an accurate depiction of land boundaries and the physical features that lie within them. Although surveyors have historically provided services to landowners, they in fact provide service to virtually every sector of society.