Google maps new !-style embed format

A while ago Google changed the structure of embedded map URLs. The old format used the web-standard key1=value1&key=value2 style, and you can find a reasonably good description of these parameters here. Unfortunately the new style is less verbose and much less intelligible, which seems like a step backwards even if these links are mostly hidden under the surface. Either Google wanted them to be less human-readable, or they care enough about saving a few bytes here and there to do this. I can’t find any good explanation of how to parse these links, so here’s my morning’s attempt. Be warned that this is all guesswork based on a limited sample and some experimentation. (more…)