I’m working on a personal project involving map-making tools for a tabletop game that I play. I’ve worked with Google Maps in the past before, and it looks like in version 3 of the API, they have removed the API key restriction.
I have done some research into making a custom map, and have come across this page on mapki, but the example seems to be focussed on creating new tiles for existing real-world coordinates.
Is it possible to make custom maps that are not dependent on real-world coordinates in the Google Maps API v3?
(Slight tangent: If it is not possible to do this, what other tools exist to make custom maps?)
You could look at OpenLayers. I get the impression it’s used a lot in the OpenStreetMaps community.
You could use Mapnik to render the tiles and serve them yourself. The OSM wiki has lots of documentation on doing that sort of thing.