yes, AGG only renders vector formats, raster processing hasn't changed. have you had a look at http://mapserver.gis.umn.edu/development/rfc/ms-rfc-4/
PROCESSING "RESAMPLE=NEAREST" PROCESSING "RESAMPLE=AVERAGE" PROCESSING "RESAMPLE=BILINEAR" PROCESSING "RESAMPLE=BICUBIC" tb On 9/18/07, Guillaume Sueur <[EMAIL PROTECTED]> wrote: > I think AGG optimization only applies on vector data. Am I wrong ? > > Guillaume > > Pål Kristensen a écrit : > > Hi! > > > > I have recently installed ms4w 2.2.6 beta which include MS 5.0 RC2. The > > reason for this was to test the new AGG rendering engine when using > > Mapserver as a WMS server, with only high resolution (RGB) rasters as the > > data source. Most WMS servers around (both free and commercial) uses nearest > > neighbor interpolation on the resulting image that is transfered to the > > client. In situations where the source data is only hires rasters or imagery > > (as in my case), the quality of the output would be much better if you could > > apply an bilinear interpolation to the produced image (see the attached > > images for an example). Because in most cases the pixels in the source data > > and the pixels on the screen do not match up, even if I have produces > > pyramids on the source data (using gdal gdaladdo with the average option > > sett). The only WMS servers that has the ability to interpolate the > > resulting image with bilinear interpolation (that I have discovered) is the > > ESRI ArcIMS ArcMap image service and the ESRI ArcGIS Server. > > > > I kind of hoped that the new AGG rendering back-end would give an option to > > set the interpolation method used in the output, but I see no difference > > when using AGG instead of GD. (IMAGEMODE is 24bit (RGB) PNG in both cases). > > Am I missing something here, or do not AGG increase the image quality if the > > resulting image if the data source is only rasters? Does anyone have any > > experience concerning this issue, and maybe could give me some advice? > > > > ArcGIS Server > > http://www.nabble.com/file/p12754990/ArcGIS_Server.png > > > > > > Mapserver 5.0 rc2 with AGG rendering > > http://www.nabble.com/file/p12754990/MapServer_5rc2_AGG.png > > > > Regards, > > Pål Kristensen > > Norwegian Mapping and Cadastre Authority > > > >
