Applying USGS Digital Line Graph Data in a Microcomputer Environment
Author: Luman, Donald E.
Source: Cartography and Geographic Information Science, 1 December 1987, vol. 14, no. 4, 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: December 1, 1987