Interactive graphics: analytical tool for geoprocessing Page: 6 of 17
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was the geographic software system which was developed to construct, manage
and retrieve geographic base data.2 This system was interfaced with the
Formatted File System. The combination was a sophisticated data management
system which provided a full range of geographic retrieval capabilities in
batch mode. --
The geographic system used the polygon overlap technique developed in the
Map Model System 3 Several important concepts formed the basis of the geo-
1. Physical independence of geographic data and other urban data.
2. Integration of data using cross reference indices.
3. Permitted the use of several identifiers for the same geographic
4. Improved digitizing, editing and geographic file construction.
5. Emphasis on transferability.
The Des Moines geographic system technology was the basis for the design
of the Fresno County planning information system. The geographic system soft-
ware was transferred to the Fresno County environment. It is the basis for
1. Des Moines Geoplanning Research Program, System Conceptualization,
USAC-DM13-002, NTIS PB220582, April 1973.
2. Des Moines Geoplanning Research Program, Systems Design/Development,
USAC-DMB-0003, June 1973.
3. Samuel Arms, Map/Model System, Technical Concepts and Program Descriptions,
Columbia Region Association of Governments, Portland, OR, February 1968.
4. E. R. Hill, The Des Moines Geoplanning Research Project, presented at
URISA Conference, Atlantic City, NJ, August 28-31, 1973.
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Hill, E.R. Interactive graphics: analytical tool for geoprocessing, article, January 1, 1973; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1058972/m1/6/: accessed May 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.