Ok, I thought of an easier way to ask my question about a capability being removed in recent Mapserver.
How can a Pick a RGB color and use that as a TRANSPARENT piexel value across the whole image, doesn't matter if the color is the background color, or a feature color. I just want to make a particular color transparent. It doesn't look like I can set transparent to TRUE without the background going transparent. What I'm after is drawing a feature layer (polygon) as transparent. Is there a way of setting a layer element transparent?? Bobb From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Basques, Bob (CI-StPaul) Sent: Monday, April 20, 2015 4:10 PM To: mapserver-users@lists.osgeo.org Subject: [mapserver-users] Background transparency vs feature (polygon) transparency. All, So I used to be able (MS6.1 and older?) to just define a color and then set transparency to ON, and that color would be transparent. It didn't matter if it was the background or a feature that was drawn in that color, it just turned transparent. I have a slightly different use case than most users as. I want to maintain a background color for the image, but filter out polygons (parcels) to be transparent in color (not opaque) as an overlay. This is to represent all Public right-of-way areas, or rather, areas that are NOT parcels. I've been trying for a couple of days now on and off to make the new methods replicate this capability, to little effect. All the new tools assume a transparency is going to be applied across the whole image background. I need to be able to only poke holes in the background where there is a parcel polygon. Is there a way to make this work like in the good old days (I mean good old versions ?? :c) of Mapsever?? One suggestion I did find that would likely work, was the use a mask, but then I need a larger bounding area to contain the mask (Is there a way of defining an edgeless mask??). Is this the track I should be persuing? I could use our City Boundary for this as a possible solution. Also, what's all the stuff about a COMPOSITE block, looks like this is the future of masking type operations in the future. Thanks Bobb
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