Digital Maps

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Most maps today are produced digitally. Digital maps can display information about a region’s land, economy, water use, crime, voting history, and much more. Digital maps can also show change over time. The two maps below show two ways that land-use has changed in the United States between the years 1982-1997.

cropland1.jpg

grazing.jpg

Source: http://www.nrcs.usda.gov/technical/land/urban.html
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Questions:

1. What do these two maps show? List at least 3 pieces of information.

2. Digital maps are printed from databases that collect and hold multiple pieces of information about specific geographic regions. What are the benefits of printing maps from such databases?

3. Are digital maps free of error? Why or why not?