Using AutoCAD as a Desktop Geographic Information System for Hydrogeological Investigations / MD. Varljen, HA. Wehrmann
- Conference Author:
- Geographic Information Systems (GIS) and Mapping¿̐ưPractices and Standards (1990 : San Francisco, California)
- Physical Description:
- 1 online resource (19 pages) : illustrations, figures, tables
- Additional Creators:
- Varljen, MD., Wehrmann, HA., American Society for Testing and Materials, and ASTM International
- Restrictions on Access:
- Subscription required for access to full text. and License restrictions may limit access.
- The popular personal computer-based computer aided drafting program AutoCAD has been utilized for the purpose of assembling and mapping information for ground-water quality studies. The power of this methodology for information management is its capacity to coalesce information from many different sources and formats, and present it in a common graphical format. The basis of this system consists of commercially available AutoCAD drawing files created from U.S. Geological Survey digital databases which contain information on terrain elevations, the location of transportation and water features, and the names of cities, towns, and major landmarks. Using these drawing files as base maps, a graphical hydrogeological database for a particular area can be assembled by importing different types of information such as bedrock topography, hydraulic conductivity distributions, or potential contaminant source locations into different data planes, or layers. Any desired combination of layers can be displayed concurrently at the same scale. Furthermore, output from ground-water flow or contaminant transport models as well as statistical estimation routines can be imported and displayed simultaneously in correct geographic orientation in relation to previously mapped features. This capability of overlaying mapped information allows for the recognition of data relationships that might not have been apparent otherwise. Examples are provided which illustrate all of these operations and indicate how appropriate mapping of available information can provide valuable insight for hydrogeological investigations.
- Dates of Publication and/or Sequential Designation:
- Volume 1992, Issue 1126 (January 1992)
- 9780803151888 (e-ISBN), 9780803114715, and 0803114710
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 8.
- Other Forms:
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription., Full text article also available for purchase., and Also available in PDF edition.
- Reproduction Note:
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1992. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
- Technical Details:
- Mode of access: World Wide Web.
- Source of Acquisition:
- ASTM International PDF Purchase price USD25.
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