Re: [mapserver-users] Using Fast CGI with MapServer to alleviatepoor performance
This shouldn't be the case, there are tests in the main API code to test projections of the map against layers to avoid this. I suspect it's projection related though... Steve On 9/19/2008 at 11:19 AM, in message [EMAIL PROTECTED], Guillaume Sueur [EMAIL PROTECTED] wrote: I guess that wms makes a reprojection job as the request comes with an EPSG code and the map projection is set by a proj string. Even if they are equivalent, can MapServer know that and forget about reprojection ? The cgi is rather straight forward as no EPSG is required. As the layers don't have PROJECTION blocks, they are drawn straight forward. my 2 cents. Guillaume Christopher Schmidt a écrit : On Fri, Sep 19, 2008 at 03:34:42PM +0100, John Westwood wrote: Hi Everybody, I am attaching a cut down version of my html, javascript and map files. On our server the EmbeddedMap.js lives in the OpenLayers directory and is used by gbhgis_openlayers.html. The test address http://148.197.8.119/gbhgis_openlayers.html . This is just a test server so please don't tell the whole World about it! :) There are four layers, 2 x raster (europe 1940s, WMS and MapServer) and 2 x vector / raster (Digital Chart of the World, WMS and MapServer) . Okay, so to cut OpenLayers out of the loop: http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.mapservice=WMSL AYERS=europeFORMAT=image%2FpngVERSION=1.1.1REQUEST=GetMapSTYLES=EXCEPTIONS=ap plication%2Fvnd.ogc.se_inimageSRS=epsg%3A3034BBOX=2097152,2097152,4194304,419 4304WIDTH=256HEIGHT=256 http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.maplayers=europ eformat=image%2Fpngmode=mapmap_imagetype=pngmapext=2097152+2097152+4194304+41 94304imgext=2097152+2097152+4194304+4194304map_size=256+256imgx=128imgy=128im gxy=256+256 The former is WMS, the latter is not-WMS. There is a very obvious speed difference between the two. The reason the MapServer image has its colors wrong, for the record, is because it is using 8bit pngs instead of 24 bit pngs. My first impression was that was the reason for the difference, but unfortunately, 8bit gifs don't seem to fare any better. Time for the URLs: MapServer: real0m0.660s WMS: real 0m2.707s These may help someone who knows MapServer investigate more. Regards, ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Using Fast CGI with MapServer to alleviatepoor performance
doesn't mapserver have to scan the whole epsg file to find the matching epsg - proj pair ? Steve Lime a écrit : This shouldn't be the case, there are tests in the main API code to test projections of the map against layers to avoid this. I suspect it's projection related though... Steve On 9/19/2008 at 11:19 AM, in message [EMAIL PROTECTED], Guillaume Sueur [EMAIL PROTECTED] wrote: I guess that wms makes a reprojection job as the request comes with an EPSG code and the map projection is set by a proj string. Even if they are equivalent, can MapServer know that and forget about reprojection ? The cgi is rather straight forward as no EPSG is required. As the layers don't have PROJECTION blocks, they are drawn straight forward. my 2 cents. Guillaume Christopher Schmidt a écrit : On Fri, Sep 19, 2008 at 03:34:42PM +0100, John Westwood wrote: Hi Everybody, I am attaching a cut down version of my html, javascript and map files. On our server the EmbeddedMap.js lives in the OpenLayers directory and is used by gbhgis_openlayers.html. The test address http://148.197.8.119/gbhgis_openlayers.html . This is just a test server so please don't tell the whole World about it! :) There are four layers, 2 x raster (europe 1940s, WMS and MapServer) and 2 x vector / raster (Digital Chart of the World, WMS and MapServer) . Okay, so to cut OpenLayers out of the loop: http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.mapservice=WMSL AYERS=europeFORMAT=image%2FpngVERSION=1.1.1REQUEST=GetMapSTYLES=EXCEPTIONS=ap plication%2Fvnd.ogc.se_inimageSRS=epsg%3A3034BBOX=2097152,2097152,4194304,419 4304WIDTH=256HEIGHT=256 http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.maplayers=europ eformat=image%2Fpngmode=mapmap_imagetype=pngmapext=2097152+2097152+4194304+41 94304imgext=2097152+2097152+4194304+4194304map_size=256+256imgx=128imgy=128im gxy=256+256 The former is WMS, the latter is not-WMS. There is a very obvious speed difference between the two. The reason the MapServer image has its colors wrong, for the record, is because it is using 8bit pngs instead of 24 bit pngs. My first impression was that was the reason for the difference, but unfortunately, 8bit gifs don't seem to fare any better. Time for the URLs: MapServer: real0m0.660s WMS: real 0m2.707s These may help someone who knows MapServer investigate more. Regards, ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Guillaume SUEUR Gérant Neogeo Technologies SARL 46 RUE MATABIAU 31000 TOULOUSE Tél : +33 6 74 91 95 20 http://www.neogeo-online.net ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Using Fast CGI with MapServer to alleviatepoor performance
Has anyone thought of using SQLite internally in mapserver for say storing the EPSG file in an indexed table for faster access. We could have a utility that would read the epsg text file and create the table for maintenance purposes. SQLite has some other interesting possibilities if you combine it with SpatiaLite which has most all of PostGIS support so you could have the OpenSource Equivalent GeoDatabase, but that probably another thread. -Steve W Guillaume Sueur wrote: doesn't mapserver have to scan the whole epsg file to find the matching epsg - proj pair ? Steve Lime a écrit : This shouldn't be the case, there are tests in the main API code to test projections of the map against layers to avoid this. I suspect it's projection related though... Steve On 9/19/2008 at 11:19 AM, in message [EMAIL PROTECTED], Guillaume Sueur [EMAIL PROTECTED] wrote: I guess that wms makes a reprojection job as the request comes with an EPSG code and the map projection is set by a proj string. Even if they are equivalent, can MapServer know that and forget about reprojection ? The cgi is rather straight forward as no EPSG is required. As the layers don't have PROJECTION blocks, they are drawn straight forward. my 2 cents. Guillaume Christopher Schmidt a écrit : On Fri, Sep 19, 2008 at 03:34:42PM +0100, John Westwood wrote: Hi Everybody, I am attaching a cut down version of my html, javascript and map files. On our server the EmbeddedMap.js lives in the OpenLayers directory and is used by gbhgis_openlayers.html. The test address http://148.197.8.119/gbhgis_openlayers.html . This is just a test server so please don't tell the whole World about it! :) There are four layers, 2 x raster (europe 1940s, WMS and MapServer) and 2 x vector / raster (Digital Chart of the World, WMS and MapServer) . Okay, so to cut OpenLayers out of the loop: http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.mapservice=WMSL AYERS=europeFORMAT=image%2FpngVERSION=1.1.1REQUEST=GetMapSTYLES=EXCEPTIONS=ap plication%2Fvnd.ogc.se_inimageSRS=epsg%3A3034BBOX=2097152,2097152,4194304,419 4304WIDTH=256HEIGHT=256 http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.maplayers=europ eformat=image%2Fpngmode=mapmap_imagetype=pngmapext=2097152+2097152+4194304+41 94304imgext=2097152+2097152+4194304+4194304map_size=256+256imgx=128imgy=128im gxy=256+256 The former is WMS, the latter is not-WMS. There is a very obvious speed difference between the two. The reason the MapServer image has its colors wrong, for the record, is because it is using 8bit pngs instead of 24 bit pngs. My first impression was that was the reason for the difference, but unfortunately, 8bit gifs don't seem to fare any better. Time for the URLs: MapServer: real0m0.660s WMS: real 0m2.707s These may help someone who knows MapServer investigate more. Regards, ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
