I think it would be very valuable.... Best Regards, Brent Fraser
On 5/10/2011 8:25 AM, Lime, Steve D (DNR) wrote:
I don't have a difference operator implemented. Wouldn't take much though... -----Original Message----- From: Brent Fraser [mailto:bfra...@geoanalytic.com] Sent: Tuesday, May 10, 2011 9:07 AM To: Lime, Steve D (DNR) Cc: mapserver-users@lists.osgeo.org 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:bfra...@geoanalytic.com] Sent: Monday, May 09, 2011 5:18 PM To: Lime, Steve D (DNR) Cc: mapserver-users@lists.osgeo.org 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: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Brent Fraser Sent: Monday, May 09, 2011 2:52 PM To: mapserver-users@lists.osgeo.org 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.
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