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| | ESRI Business Information Solutions - Services & Solutions - Defining a Study Area |
 | | Choose an intersection, address, or a predetermined latitude and longitude coordinate as the centerpoint of a donut study area. |
 | | They are an effective tool for defining areas where access to a site is greatly affected by natural and man-made barriers, such as mountains, rivers, lakes, canyons, bridges, and highways, in the total drive time under normal traffic conditions. |
 | | Choose an intersection, address, or a predetermined latitude and longitude coordinate as the centerpoint of a drive-time study area. |
| www.esribis.com /support/reports/definingstudyarea.html (829 words) |
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