Ticket #1305 (assigned enhancement)
(Prelim) Gradient Support for Mapserver 4.4.1
|Reported by:||bill@…||Owned by:||sdlime|
|Cc:||woodbri@…, sgillies@…, mapserver@…, mko, sholl, havatv, jmckenna|
Description (last modified by sdlime) (diff)
As I posted on the mapserver-users list, I have put together a hack to get gradient colors from a single style. Here is the post: ... Regarding the gradient coloring, it works like this: you choose a numeric field in your data (I've tested with PostGIS, but anything you can use for classitem or labelitem should work), and create a style like this: STYLE COLOR 60 60 60 MINCOLOR 0 0 0 MAXCOLOR 255 255 0 MINVALUE 0.0 MAXVALUE 300000.0 GRADIENTITEM "sale_price" END That takes the sale_price field from the shapes values, maps its value to a percentage between MINVALUE and MAXVALUE and then picks the color that's appropriate from the color range. For a quick snapshot of how this looks, I've mapped relative size of parcels (as a percentage) to these colors: MINCOLOR 127 29 200 #Purple MAXCOLOR 255 255 0 #Yellow You can see the results here: http://www.binko.net/gradient.png As I said, this is still in the proof of concept stage, and I haven't tested against any rendering except GD (although in theory it should work). I have gotten some feedback from the -users group, but I'd appreciate any from the core developers. I will post a patch against 4.4.1 as well. Bill
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