php map software

[Michael A. Peters]

I'm curious as to whether or not anyone is aware of existing php code to 
plot data on a map.

Specifically - I'd like to divide the county I live in into hexagons, 
feed various GPS coordinates to the php script, and the hexagon 
containing the long/lat coordinated gets filled in (entire hexagon).

Purpose is to make a range map within my county of confirmed wild 
reptiles/amphibians by species without providing the precise coordinates 
for where the specimen was found.

I'm hoping there is already some existing php code I can adapt for this 
kind of thing (hexagons are better than squares for this type of thing, 
but I'm guessing a little more complex in the math to figure out which 
hexagon a coordinate belongs to).

Any pointers appreciated.