Hi, I think OPACITY should still work at the STYLE level: https://mapserver.org/mapfile/style.html#mapfile-style-opacity If you are using WMS then you could setup different styles with different OPACITY values, and then use named styles to select the appropriate style (with the STYLES= added to the WMS request).
Seth -- web:https://geographika.net twitter: @geographika On Wed, Feb 22, 2023, at 4:46 PM, Steve Lime wrote: > Hi Matthew: That functionality was indeed removed as part of 8.0. I kind of > expect that we might build back something for more limited use cases if > necessary, Does SLD support opacity/transparency? > > --Steve > > > On Tue, Feb 21, 2023 at 10:52 AM Matthew Graber <graber...@gmail.com> wrote: >> Hello all! >> >> With MapServer 8, I'm wondering what the proper way to change the opacity of >> a single layer in a multilayer WMS request is. >> >> For example, the following URL excerpt shows the old way of accomplishing >> this that worked while using MapServer 7: >> >> SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&LAYERS=test_a,test_b&map.layer[test_b]=OPACITY+50 >> >> My understanding is that this would have the same effect as adding "OPACITY >> 50" to the test_b layer in the mapfile. The mapfile containing test_a and >> test_b did not have OPACITY included when they were written. Obviously, this >> no longer works with MapServer 8, and now that request has the same results >> as omitting the "&map.layer[test_b]=OPACITY+50" portion entirely. >> >> Based on https://mapserver.org/fr/MIGRATION_GUIDE.html, I see that OPACITY >> now belongs inside a COMPOSITE object. I tried the following modifications >> to the request URL: >> >> SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&LAYERS=test_a,test_b&map.layer[test_b].composite=OPACITY+50 >> SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&LAYERS=test_a,test_b&map.layer[test_b].composite[0]=OPACITY+50 >> >> I also tried this both with the mapfile left as-is, and with an empty >> COMPOSITE object being included in each layer object, and each time I got >> the same unsuccessful result as before. >> >> Is there a way to accomplish this in MapServer 8? >> >> Also, does this map.layer[layername]=... syntax still work in MapServer 8? >> The documentation at >> https://mapserver.org/cgi/controls.html#using-mapserver-version-8 suggests >> it might no longer work for MapServer 8 (based on the heading "Using >> MapServer version < 8"), but the documentation at >> https://mapserver.org/pdf/MapServer.pdf shows the same examples with the >> heading "Using MapServer version <= 8" on page 1065 of the PDF, so I'm >> unsure if this is still intended to work in MapServer 8. >> >> Thank you, >> Matt >> _______________________________________________ >> MapServer-users mailing list >> MapServer-users@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ > MapServer-users mailing list > MapServer-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/mapserver-users >
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