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If you don't know the extent in coordinates of the prj file, you have to georeference the file manually using ground control points. This is rather comfortable if you have QGIS installed, and you can guess some details from the image. In some cases, you can build the extent manually if the filename follows a certain rule, like the one-degree-SRTM files do. ...


If you render raster data into map tiles you have to choose whether you want to create a Google Earth tiles (in Plate Carree) for displaying in KML/KMZ or Google Maps tiles (Mercator) for displaying in the web viewers such as OpenLayers, Google Maps, Leaflet, etc. These uses two different map projections. Cartographically correct solution is to render two ...

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