Computer Cartography Offers County Unlimited Combinations and Considerable Savings

by Vern Cartwright, (M.ASCE), Pres.; Cartwright Aerial Surveys, Inc., Sacramento, Calif.,
Joseph P. Alessandri, (M.ASCE), Chf.; Water Resources Div., Dept. of Public Works, County of Sacramento, Sacramento, Calif.,


Serial Information: Civil Engineering—ASCE, 1976, Vol. 46, Issue 11, Pg. 60-64


Document Type: Feature article

Abstract: A Sacramento County pilot program to compare conventional scribed overlay mapping with computer cartography has shown that initial savings of nearly $6,000 per square mile result when maps are digitized directly from source documents. Additional savings will result from improved information retrieval, availability and accuracy, additional map sales revenue, and the eventual elimination of costly duplication by various map-making departments and agencies in the County. The source documents were digitized, edited on a CRT unit, compiled, and computer plotted with 16 data levels and 35 sublevels. Nearly infinite variations of composite maps are possible with this system. Sacramento County hopes to gradually convert to a complete computer-cartography map information management system (CMIMS).

Subject Headings: Cameras | Computer applications | Graphic methods | Information management | Mapping

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