42. Tiling Blue Marble

Recipe for creating a tileset for Blue Marble

• Ensure you have gdal-bin installed: sudo apt-get install gdal-bin gdal-python

• Add this line to the end of /usr/share/proj/epsg/:

  # Google Mercator added by Tim
  <900913> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs
  

• Go to the Blue Marble directory containing untiled images for the mosaic (e.g. /home/maps/bluemarble)

• Build a virtual mosaic by doing this: gdalbuildvrt bluemarble.vrt *.tif
• Generate the tileset by doing this:

gdal2tiles.py -s EPSG:4326 -z 1-15 -e -t \
    "NASA Globale Blue Marble Mosaic." \
    -u http://maps.sansa.org.za/bluemarble/ \
    -c "http://visibleearth.nasa.gov/" bluemarble.vrt bluemarble-tiles