T2K or tiles2kml enables you to efficiently load large set of imagery or raster maps very quickly into GoogleEarth using Region-Based Network Links. This method has an onRegion option, which specifies to load the Region data only when the Region is active. So only the needed set of data is loaded with multiple levels of detail, larger amounts of data are loaded only when the user's viewpoint triggers the next load.

Ссылка: http://www.tile..oad/T2K_setup.zip