I am having some serious trouble finding a solution to fit my current needs. I am attempting to create contour maps from irregularly spaced point-data on the fly to overlay on a Google map. I have looked at almost everything I can find, but I haven't come across anything that seemed to do this. I cannot generate the contours before use, as there are literally thousands of possible maps, and they change regularly. If anyone knows of anything that might help me accomplish this, it would be extremely helpful.
EDIT: I am fairly new to all of this stuff, so there is a good chance I have missed something basic. Please let me know if that is the case.