Hello, I was wondering what will be promising ways for raster performance optimization for about 5000 DOP. I did identified 4 different (and more or less independent) ways.
1) Building pyramids (external overviews) with gdaladdo of each tif file. gdaladdo --config GDAL_CACHEMAX 200 --config COMPRESS_OVERVIEW JPEG --config PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL --config JPEG_QUALITY_OVERVIEW 80 -ro *.tif 2 4 6 8 16 32 64 128 25 Creating a tile-index with gdaltileindex. gdaltindex index.shp *.tif 2) Building a seamless mosaic from all tif files with gdalbuildvrt. gdalbuildvrt mosaic.vrt *.tif (works, but will be large) After that building pyramid (external overview) with gdaladdo of the mosaic file. gdaladdo --config GDAL_CACHEMAX 200 --config COMPRESS_OVERVIEW JPEG --config PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL --config JPEG_QUALITY_OVERVIEW 80 -ro mosaic.vrt 2 4 6 8 16 32 64 1 This does not really work out since (I guess hardware is my limiting factor). 3) Building a seamless mosaic from all tif files with gdalbuildvrt. gdalbuildvrt mosaic.vrt *.tif Creating a pyramid with gdal_retile.py gdal_retile.py -v -co GDAL_CACHEMAX=200 -of GTIFF -co COMPRESS=JPEG -co JPEG_QUALITY=80 -co PHOTOMETRIC=YCBCR -ps 10000 10000 -co "TILED=YES" -s_srs epsg:25832 -levels 10 -tileIndex tindex -pyramidOnly -ta Also this does not really seem appropriate. 4) Creating static singled file external overviews manually. Here i''m not sure how to determine reasonable scales. Do you have any further suggestions or tips I have not mentioned above? Thanks for your input and links. Best regards Bjoern _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev