EarthView is a free and open source Earth globe 3D visualization for iOS that uses OpenGL ES and GLKit for rendering, and map tiles for imagery.
The EarthView project uses a quad-tree to page in map tiles that conform to the Tile Map Service standard (or, the flipped Google equivalent).
The level of detail to display is automatically determined by the estimated screen-space error of a given page.
Detailed instructions on how to use the EarthView library are available HERE.
Requirements:
· iOS 5 SDK
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