Hi, I'm trying a number of methods for exporting images:
1. I used the MgRenderingService class to produce an image (had to use a nasty hack to get the current extent as map.GetDataExtent(); doesn't seem to work?), but using this method does not give me any control over the image dpi. 2. I then sent a request over HTTP directly to the MapAgent CGI - this gives me the flexibilty to pass parameters over the URL, however when I set different DPI values, I always get an image set at 72 dpi. Here is a sample of the request: http://localhost/mapguide/mapagent/mapagent.fcgi?OPERATION=GETMAPIMAGE&VERSION=1.0.0&SESSION=6669fbe4-0000-1000-8000-0013d3c0f8fe_en_C0A801140AFC0AFB0AFA&MAPNAME=Sheboygan&LOCALE=en&FORMAT=PNG&SETVIEWCENTERX=-87.732492&SETVIEWCENTERY=43.743934&SETVIEWSCALE=5000&SETDISPLAYDPI=96&SETDISPLAYWIDTH=1024&SETDISPLAYHEIGHT=768 This URL uses 96 DPI - if i sent the same URL but increased the DPI, this has the effect of changing the extent of the actual image, despite keeping the other parameters static. I read on a post that DPI can be overriden "if the session allows it"? Does this mean that I have to update the session somewhere? I have attached three images using different DPI values (96, 300 and 600) which illustrates the effect. http://www.nabble.com/file/p12533054/http_request96.png http_request96.png http://www.nabble.com/file/p12533054/http_request300.png http_request300.png http://www.nabble.com/file/p12533054/http_request600.png http_request600.png I have also tried to increase the image width and height as I increase the dpi - this maintains the extent of the image, but does not alter the dpi. This method also results in some rather strange labelling - the number of labels increases per feature. Cheers Simon -- View this message in context: http://www.nabble.com/Overriding-DPI-tf4395160s16610.html#a12533054 Sent from the MapGuide Users mailing list archive at Nabble.com. _______________________________________________ mapguide-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapguide-users
