I don't have a difference operator implemented. Wouldn't take much though...
-----Original Message----- From: Brent Fraser [mailto:[email protected]] Sent: Tuesday, May 10, 2011 9:07 AM To: Lime, Steve D (DNR) Cc: [email protected] Subject: Re: [mapserver-users] Rendering Challenges Using STYLE GEOMTRANSFORM "difference([shape],buffer([shape], -5))" COLOR 255 211 127 END results in the entire original polygon being filled. Using GEOMTRANSFORM (difference([shape],buffer([shape], -5))) results in no fill. Best Regards, Brent Fraser On 5/9/2011 4:20 PM, Lime, Steve D (DNR) wrote: > That's were a difference operator might come in handy since you're looking > for more of a fill-type effect: > > GEOMTRANSFORM (difference([shape], buffer([shape], -2))) > > or something like that. > > Steve > > -----Original Message----- > From: Brent Fraser [mailto:[email protected]] > Sent: Monday, May 09, 2011 5:18 PM > To: Lime, Steve D (DNR) > Cc: [email protected] > Subject: Re: [mapserver-users] Rendering Challenges > > Steve L., > > Good point; I couldn't do any of this in pre-6.0 either! > > I tried the buffer and it worked great (but we might have to work on > the end-cap types in PDF output)! See http://i52.tinypic.com/2qjc9yv.jpg > > Best Regards, > Brent Fraser > > > On 5/9/2011 2:36 PM, Lime, Steve D (DNR) wrote: >> These aren't specific to 6.0 though- more of a wish list... >> >> Item 1 might be doable in 6.0 as it sits. In 6.0 a style GEOMTRANSFORM is >> really an expression and I exposed >> the GEOS buffer operator as a proof-of-concept. For example: >> >> STYLE >> GEOMTRANSFORM (buffer([shape], -2)) >> OUTLINECOLOR 255 0 0 >> END >> >> Should generate a single pixel red line on the inside of a polygon shape. >> You can render it however you'd like. >> Note that a GEOMTRANSFORM is performed AFTER a shape is converted from map >> to image coordinates so it's effective >> for rendering effects only. >> >> If we exposed a few others you'd be able to do some other interesting things >> (like fills just inside a line...). >> >> The rest of the ideas are interesting and worthy of discussion. >> >> Steve >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Brent Fraser >> Sent: Monday, May 09, 2011 2:52 PM >> To: [email protected] >> Subject: [mapserver-users] Rendering Challenges >> >> While testing v6, I can up with the following list of things I >> couldn't do (see http://i56.tinypic.com/8vvprn.png for a graphic): >> >> 1. Render lines inside polygon boundary (with or without opacity) >> 2. Place polygon annotation on/inside boundary line >> (http://trac.osgeo.org/mapserver/ticket/1592 point 8.) >> 3. Rotate anno if required to fit inside a polygon >> 4. Place polygon annotation outside polygon if anno doesn't fit inside >> 5. Place line anno above (or below) when using ANGLE FOLLOW >> 6. Rotate vector symbols to follow lines (a font might work but is a >> pain to create) >> 7. User specified character spacing >> 8. Erase lines (but not other objects) under annotation >> >> My goal was to use the published shp files >> (http://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/092/h/canvec_092h06_shp.zip) >> without modification and see how close I could get to the published PDF >> (http://ftp2.cits.rncan.gc.ca/pub/cantopo/50k_geopdf/092/h/cantopo_092h06_geopdf.zip). >> >> >> Any suggested rendering techniques are appreciated. I'll file >> tickets for those problems deemed worthy. >> > > > _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
