On Fri, Sep 19, 2008 at 11:49:50AM -0400, Nolte, Tim wrote: > Just a note about the performance differences between the two outputs. A > 24bit png is always going to take longer to render than an 8bit.
but as I said in my email, this is unrelated: even a gif (8bit maximum) is taking approximately the same amount of time to render. > Obviously there is more detail in the 24bit thus it's going to take > longer. If you want the same 24bit look with straight MapServer you need > to make a change to your map file. You currently have set: > > MIMETYPE "image/png" > > change to > > MIMETYPE "image/png; mode=24bit" > > This will give you the same 24bit output between straight MapServer and > WMS. You'll also be able to compare your speeds more accurately. > > - Tim > > ---- > Timothy J Nolte - [EMAIL PROTECTED] > Network Planning Engineer > > iPCS Wireless, Inc. > 4717 Broadmoor Ave, Suite G > Kentwood, MI 49512 > > Office: 616-656-5163 > PCS: 616-706-2438 > Fax: 616-554-6484 > Web: www.ipcswirelessinc.com > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Christopher Schmidt > Sent: Friday, September 19, 2008 11:18 AM > To: John Westwood > Cc: mapserver-users@lists.osgeo.org > Subject: Re: [mapserver-users] Using Fast CGI with MapServer to > alleviate poorperformance > > 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.map&serv > ice=WMS&LAYERS=europe&FORMAT=image%2Fpng&VERSION=1.1.1&REQUEST=GetMap&ST > YLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=epsg%3A3034&BBOX=2 > 097152,2097152,4194304,4194304&WIDTH=256&HEIGHT=256 > > http://148.197.8.119/cgi-bin/mapserv?map=/data/map-files/gbhgis.map&laye > rs=europe&format=image%2Fpng&mode=map&map_imagetype=png&mapext=2097152+2 > 097152+4194304+4194304&imgext=2097152+2097152+4194304+4194304&map_size=2 > 56+256&imgx=128&imgy=128&imgxy=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: real 0m0.660s > WMS: real 0m2.707s > > These may help someone who knows MapServer investigate more. > > Regards, > -- > Christopher Schmidt > MetaCarta > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > -- Christopher Schmidt MetaCarta _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users