Quality of Map Data in Geographic Information Systemsby Gary A. Jeffress, Texas A&M Univ, Corpus Christi, United States,
Abstract: Local government engineers wanting to take advantage of computer aided design (CAD) and geographic information system (GIS) need to understand the quality and accuracy of digital base maps before using them for design and quantity estimation. For accurate design, estimates, and construction, the location of street rights-of-way and the infrastructure they contain is required to levels of accuracy obtainable by precise global positioning system (GPS) and ground survey. Once a precise survey control network is in place, the updating and extension of the base map can be easily accomplished by requiring connections to control monuments and survey data in digital form.
Subject Headings: Geographic information systems | Information systems | Mapping | Global positioning systems | Computer aided design | Data collection | Control surveys
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