G'day all. Does anybody have a howto on Mapserver performance enhancement?
My particular environment of interest is a relatively small set of geometries in a PostGIS database and a collection of geotiff aerial photography images onto which I overlay the geometries. The geometries are fully indexed, relatively static and vacuum analyzed every night. One of the options that users have is to request a "movie" of up to 20 frames; each of which consists of a background raster plus up to about five circular geometries, about five points and maybe ten other lines/polygons. The amount of geometry involved is so small, the bottleneck has to be the raster processing. The images are 2m/pixel and are typically 20 - 150 Mb each. The frame extents include most if not all of an image so tiling does not seem relevant. I have specified 80% JPEG as the output to minimise final image size and this seems successful (at least in terms of size and hence download time) I am looking for ways to reduce the time taken in the image generation phase. TIA, Stephen Davies ======================================================================== This email is for the person(s) identified above, and is confidential to the sender and the person(s). No one else is authorised to use or disseminate this email or its contents. Stephen Davies Consulting Voice: 08-8177 1595 Adelaide, South Australia. Fax: 08-8177 0133 Computing & Network solutions. Mobile:0403 0405 83
