I am trying to draw a census tract on a Google map. It looks like Google Maps lets you draw polygons using longitude and latitude coordinates. However, the data that I have is not longitudes/latitudes.
The specific dataset I have looks like this. The "spatial reference" for this data is 3857. But after looking up this spatial reference on this page, I still am not quite sure how to go about drawing the shape to the map using longitudes/latitudes.
I assume that this sort of thing can be done with GIS software or command line tools, but I am more interested in code libraries or APIs that could make this possible. Also, if anyone knows of a better source of census tract shape data which is more compatible with Google Maps, that would be great too.
Best Answer
Welcome to the GIS StackExchange. The library you are looking for is Proj4, originally written in C/C++. You can also find Proj4 APIs in other languages:
Enjoy.