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An Enhanced Digital Line Graph Design
In response to increasing information demands on its digital cartographic data, the U.S. Geological Survey has designed an enhanced version of the Digital Line Graph, termed Digital Line Graph - Enhanced (DLG-E). In the DLG-E model, the phenomena represented by geographic and cartographic data are termed entities. Entities represent individual phenomena in the real world.
The History of Cartography, Volume 6
For more than thirty years, the History of Cartography Project has charted the course for scholarship on cartography, bringing together research from a variety of disciplines on the creation, dissemination, and use of maps. Volume 6, Cartography in the Twentieth Century, continues this tradition with a groundbreaking survey of the century just ended and a new full-color, encyclopedic format. The twentieth century is a pivotal period in map history. The transition from paper to digital formats led to previously unimaginable dynamic and interactive maps. Geographic information systems radically altered cartographic institutions and reduced the skill required to create maps. Satellite positioni...
Journal of Research of the U.S. Geological Survey
Scientific notes and summaries of investigations in geology, hydrology, and related fields.
The History of Geographic Information Systems
These authors' contributions helped bring to national, state, and federal agencies the powerful new suite of geospatial tools for issues ranging from land use management to population enumeration."--BOOK JACKET.
Technical Papers
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