Hi! After reading history.txt of MS 5.0 Final I found out that this issue actually was a bug (ticket 2303) that was solved from RC2 to final release. I was also not aware of the PROCESSING "RESAMPLE=BILINEAR" statement that applies to a raster layer. This statement does exactly what I tried to accomplish, so thanks for the help.
Regards, Pål Pål Kristensen wrote: > > 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 > -- View this message in context: http://www.nabble.com/Interpolate-image-tf4473610.html#a12755747 Sent from the Mapserver - User mailing list archive at Nabble.com.
