On 2/5/06, Kyle Mulka <[EMAIL PROTECTED]> wrote: > I think the information I need would fit in the documentation here under > Preprocessing-rasters: > http://mapserver.gis.umn.edu/docs/howto/raster_data/#preprocessing-rasters
Kyle, The short answer is that you should convert the data to an internally tiled format, and then build overviews. eg. gdal_translate -co TILED=YES your.tif tiled.tif gdaladdo tiled.tif 2 4 8 16 32 64 128 256 > One program I've looked at is gdaladdo: How do I test to make sure > overlays are in fact being used? How do I know what levels of overlays > to create? How do I systematically test performance so that I know what > I'm doing to the images is a good use of my, and my computers processing > time? To check if the overview generation worked, run the gdalinfo program. After each band listed it will show the overviews present. If GDAL sees them, then they should be used. > I wonder if I could reduce the quality of the images slightly to improve > performance. There should be no need for this. You should really provide details of your LAYER definition, and the gdalinfo report from the data for better feedback. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent
