Going Further
Variations
Use the techniques from this chapter to study the data used to create most color-coded digital maps as well as the light intensity and spatial relationships in most images created with digital cameras.
See example: Who are You More Alike?.
Other Data
Color-coded maps at the Gulf of Maine Ocean Observing System (GoMOOS).
Any color-coded map available on NASA's Earth Observatory, Blue Marble, or Visible Earth.
The analysis software works on any satellite image available at the above websites and at EOS-WEBSTER and Digital Earth Watch.
Other Techniques
For a given location on the Pollen Viewer maps, study the change of size of landmasses. For example, the line tool counts the number of pixels along a line. Use this to measure the change in Florida's width as sea level rose over the past 21,000 years.
Tip: Convert line length in pixels to percent change from original width 21,000 years ago using your spreadsheet.
