Geographic Information Systems |
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Maps are a way to communicate geographic information that can be displayed in different scales.
The scale of the map is the ratio of the distance on the map to the distance on the ground. The map scale shows you how 'zoomed in' or 'zoomed out' you are. Notice how the level of detail changes on the large and small scale maps on the right. The large scale map shows greater detail but the area is not as large. The small scale (or more zoomed out) map showing less detail because more area is shown. Major highways and roads are included on the large-scale map, whereas no streets are included on the small-scale map, only the country names. |
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This course is funded by a grant from the National Science Foundation DUE 0603455 Using a Web-based GIS to Teach |