I have custom radar tiles that I am trying to overlay over Google Maps in an Android application. My question is how do I know what Google tiles are currently showing on my phone device to know which of my custom tiles to load on top?
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I have custom radar tiles that I am trying to overlay over Google Maps in an Android application. My question is how do I know what Google tiles are currently showing on my phone device to know which of my custom tiles to load on top?
I’m not 100% sure that Android does it the same way as the JavaScript Maps API v3 does it, but since it probably does:
You can review the info here: http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypes.
A specific tile is specified by three things: the zoom level, the x coordinate, and the y coordinate. Based on the info in the above link, you can determine what area of the world to render as a 256×256 tile based on those three integers. Pay special attention to the “Tile Coordinates” section of the above document.