Applying USGS Digital Line Graph Data in a Microcomputer Environment
Author: Luman, Donald E.
Source: Cartography and Geographic Information Science, Volume 14, Number 4, December 1987 , pp. 321-344(24)
Abstract:In this paper I discuss the potential of U.S. Geological Survey Digital Line Graph data for applications to microcomputer-based cartographic and geographic information systems. The DLG-3 data base produced from 1:100,000-scale maps is the principal focus because of its importance in providing the cartographic framework for the 1990 decennial census. Topological relationships inherent in DLG-3 data are reviewed as a basis for discussion of how additional digital cartographic data, including the U.S. Geological Survey Land Use and Land Cover data can be converted to the same DLG-3 data structure. The development and applications of software implemented to manipulate DLG-3 data on a microcomputer are reviewed and illustrated through examples of DLG-3 formatted data.
Document Type: Research article
Publication date: 1987-12-01
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