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The Eyes in the Sky II project website has not been significantly updated since 2012. We are preserving the web pages here because they still contain useful and ideas and content. But be aware that the site may have out of date information. For more recent information you may want to explore the GIS/Remote Sensing area of the Teach the Earth portal.

Week 6: Following Rivers Through Time

Getting to Know Classification in GIS

Classification is the process of sorting features on a map into groups or categories. The specific method of classification that you choose can lead to very different displays of data on maps.

The two images below were created with the same data, but using different classification methods. Take some time to examine them and think about how the data may have been split into the groupings you see.

US_equal_interval US_quantile