avoid creation of tiles for no-data areas

syncpoint / terrain-rgb

A detailed tutorial about how to convert geo-tiff files containing Digital Elevation Model (DEM) data into a pyramid of png tiles

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avoid creation of tiles for no-data areas #2

Open ThomasHalwax opened 4 years ago

ThomasHalwax commented 4 years ago

A huge amount of tiles do not contain any data. In order to speed up the process of tile creation and to save lots of space we should skip all areas that do not contain any elevation data.

ThomasHalwax commented 2 years ago

The current version of gdal2tiles allows

making tiles with No Data transparent (-a <NODATA>, --srcnodata=<NODATA>)
excluding transparent tiles from the tileset (-x, --exclude)

This will not speed up the process of creation but at least save space.