Kyle - Well, if you increase the WIDTH and HEIGHT to 512 it will certainly look better - and larger!
You are taking a relatively large image and asking MapServer to shrink it down for you for display. I haven't time to decipher all the JavaScript in there, but I suspect your "simply chopping up tiles using ImageMagick" example is actually generating HTML that tells the client browser to stuff an oversized PNG into a smaller IMG tag. Your individual image tiles (from the floorplans/tiles/ directory) are actually much larger images than your http://maps.kylemulka.com/imagemagick/livedude.php displays. Each individual tile is 512x512 pixels, but your final output image is much smaller than that. As a result, the quality of the output image may depend heavily on the browser being used. I think those 512x512 tiles are being displayed in IMG tags with HEIGHT and WIDTH properties set to a smaller value. The browser then squishes the images into the IMG space available. The image you're using is almost a worst-case scenario for MapServer. It's essentially a vector drawing that's been scanned as a raster image. You've got lots of thin lines that easily appear and disappear at different scale levels, depending on how the image is resampled. If you're going to use scanned line art in MapServer, you'll get the best results by producing high-quality resampled versions (ImageMagick is fine) at each specific scale/zoom level you'll want to use. Then force the user to only use one of your preselected zoom levels. Make sure that each image - when displayed - ends up exactly the same size as the original image on your server. - Ed Ed McNierney President and Chief Mapmaker TopoZone.com / Maps a la carte, Inc. 73 Princeton Street, Suite 305 North Chelmsford, MA 01863 [EMAIL PROTECTED] (978) 251-4242 -----Original Message----- From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of Kyle Mulka Sent: Monday, April 03, 2006 7:30 AM To: [email protected] Subject: Re: [UMN_MAPSERVER-USERS] Increase Clarity of WMS Here's one of the WMS tiles I'm using. I've tried stretching it using different values for the height and width but nothing I've tried has made it look better or worse. http://kylemulka.com/cgi-bin/mapserv?map=floorplans.map&REQUEST=GetMap&S ERVICE=WMS&VERSION=1.1.1&LAYERS=dude-1&STYLES=&BGCOLOR=0xFFFFFF&TRANSPAR ENT=TRUE&SRS=EPSG:4326&BBOX=-83.7158203125,42.2905166207974,-83.71444702 148438,42.291532494305976&WIDTH=256&HEIGHT=256 -Kyle Josh Livni wrote: > Kyle, > > I could be wrong -- I haven't used a mapserver wms in Google Maps - > but I think your mapserver image may be being squashed a bit. It's a > bit less wide relative to the height/width of your Imagemagick > version. Also the gmap div seems to be a different height/width in the > different versions. > > WMS will happily respond with the exact extent, but perhaps not the > relative height/width you expect, thus 'squashing' the image, which > may be causing the image issues you're seeing. > > You may want to play with this by adding a &height &width to the wms > query, or you could try playing with the div height/width ratios, and > seeing if you get similar results if one is a bit off, as I may be > off-base with this theory. > > -Josh > > Kyle Mulka wrote: > >> I have these very detailed floor plans that I'd like to georeference >> and display through mapserver's WMS sever, however, the clarity of >> the images degrades when it goes through. How can I increase the >> clarity of these floorplans through the WMS? >> >> Here's with mapserver: >> http://maps.kylemulka.com/floorplan-test10.php >> >> Here's without (simply chopping up tiles using Imagemagick) >> http://maps.kylemulka.com/imagemagick/livedude.php >> >> Here's the parts of the map file for just the first floor: >> MAP >> NAME "UofM" >> FONTSET fontset.txt >> PROJECTION >> "init=epsg:4326" >> END >> IMAGETYPE png24 >> EXTENT -83.747063 42.272038 -83.709126 42.297056 SHAPEPATH >> "/umdata/" >> LAYER >> NAME "dude-1" >> TYPE raster >> DATA "dude1.tif" >> PROCESSING "RESAMPLE=AVERAGE" >> PROCESSING "DITHER=YES" >> METADATA >> "wms_title" "dude-1" >> "wms_onlineresource" >> "http://kylemulka.com/cgi-bin/mapserv?map=floorplans.map&"; >> "wms_srs" "EPSG:4326" >> END >> STATUS ON >> END >> END >> >> -Kyle > > > > >
