I have exported a map from tilemill as mbtiles and converted them to xyz tiles with help of mbutil. The tiles should be used (for learning purpose) with mod_tile or GeoServer and displayed in OpenLayers.
in OpenLayers already exists a bunch of layers using the gauß-krüger projection.
Do you know a program which runs under ubuntu-terminal to reproject these tiles from Mercator to Gauß-Krüger projection to have only one used projection?
Inspecting a raster tile with gdalinfo gives me following info:
Driver: PNG/Portable Network Graphics Files: /Users/srv/Desktop/tiles/11/586/784.png Size is 256, 256 Coordinate System is `' Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 256.0) Upper Right ( 256.0, 0.0) Lower Right ( 256.0, 256.0) Center ( 128.0, 128.0) Band 1 Block=256x1 Type=Byte, ColorInterp=Palette Image Structure Metadata: NBITS=1 Color Table (RGB with 1 entries) 0: 245,253,240,255