I have some data points with ID, value, latitude and longitude. Now I try to show colored areas on a google map (see attachment):
RED: where value > 90
YELLOW: value > 75 and <= 90
GREEN: value <= 75
My biggest problem is how to find areas with same color and draw them in a Google Map. Has anybody did this before and can give me some hints? Does anybody knows an extension which can do this? Any other suggestions?
Any help will be appreciated.