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Topological modeling
In the past 35 years, were there any gas stations or factories operating next to the swamp? any within two miles and uphill from the swamp? A GIS can recognize and analyze the spatial relationships among mapped phenomena. Conditions of adjacency (what is next to what), containment (what is enclosed by what), and proximity (how close something is to something else ) can be determined with a GIS.
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The content of this page was copied from USGS Website.
For more information please refer to the site: mapping.usgs.gov
