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This is pretty cool. I'd advise not changing the URL with every map movement and instead let the user generate a linkable URL upon demand. This created quite the enormous history list after only using a few minutes.

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Would replaceState() help? http://stackoverflow.com/a/20937387/1619998

To be honest this didn't cross my mind. But true, I should do something about it.

You can keep your urls sharable and avoid breaking the back button by storing the map state in the url hash.

something like: `location.hash = '#map/' + mapLat + '/' + mapLng + '/'+ mapZoom;`

Here's an example of one I made for a client recently. http://www.btforasthma.com/find-a-clinic?ctry=US&state=NY&lo...

Incidentally, if anyone is looking to hire a consultant with mapping experience, hit me up.

That still creates a history state, so if you make 10 map moves, you have to click "back" 11 times to get back to the previous page.

replaceState() works a lot better:

https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/M...

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