Isoline Maps

An isoline map is any map that uses continuous lines to join points of equal value.  If it looks similar to a contour map, you are 100 percent correct.  Isoline maps include contour maps, isotherms, isobars, isotachs, ect.  This makes isoline maps two-dimensional representations of places.  Isoline maps are often used in meteorology.  The above map is a isoline map of average temperatures of the United States.  As you can see red line signifies the hottest areas, while blue signifies the coldest areas.

The map URL is: http://indiemaps.com/blog/2008/06/isolining-package-for-actionscript-3/