<p>I just installed as many Android map apps as I could find, and it looks like they all respond to <code>geo:</code>:<br>
<a href="https://cloud.githubusercontent.com/assets/143465/5708552/69bc5634-9a92-11e4-9fb9-4dc825464c91.png" target="_blank"><img src="https://cloud.githubusercontent.com/assets/143465/5708552/69bc5634-9a92-11e4-9fb9-4dc825464c91.png" alt="view-geo-in-android" style="max-width:100%;"></a></p>

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