This exhibition explores four constituent professions represented by the ACSM - surveying, cartography, geodesy and geographic information systems (GIS) - and draws on both the Library's historic map collections and the ACSM collection in the Library of Congress. The exhibit also features a video that provides a historical and spatial comparison of the surveying maps featured in this exhibit. These maps are overlaid with contemporary GIS data of the same area and show the power of GIS in presenting and interpreting landscape over time.

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