This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Caspar, > We use WMS from a THREDDs server for assembling and presenting climate > change maps on our portals in NCAR-RAL and for client portals (WorldBank, > PAGASA-Philiippines Met Service, Bahrain, …). Services work smoothly and > are extremely helpful. > > Now we would like to upgrade our presentations by indicating where the > projected climate changes are significant. We want to do this via > stippling (see example graph below). What would you suggest is the best > way to get shippling through WMS? We store the information in separate > netCDF files, one for the climate field and one with the same grid but > with integer information 0,1 intended for stippling. While we can generate > color layers, we can’t seem to find pointers to layer formats that would > reflect stippling. Are we on the wrong track doing this in WMS? > > Would you be able to point us in a good direction? The WMS implementation used in THREDDS is ncWMS [1]. The “Uncertainty Data” section [2] of the ncWMS documentation discusses support for stippling to visualize uncertainty data (see the “uncert-stippled” style at the end of that section). The “EDAL SLD Specification” appendix [3] has two sections on stippling [4, 5] but again it appears focused on visualizing uncertainty data. I'm not finding anything about stippling to visualize mask data as it sounds you wanting to do. You might ask on the ncWMS issues page [6] if there is support for that functionality. I hope that helps. Cheers, Ethan [1] https://reading-escience-centre.gitbooks.io/ncwms-user-guide/content/ [2] https://reading-escience-centre.gitbooks.io/ncwms-user-guide/content/05-data_formats.html#uncertain [3] https://reading-escience-centre.gitbooks.io/edal-user-guide/content/appendices/sld_spec/introduction.html [4] https://reading-escience-centre.gitbooks.io/edal-user-guide/content/appendices/sld_spec/xml_description/patterns.html [5] https://reading-escience-centre.gitbooks.io/edal-user-guide/content/appendices/sld_spec/xml_usage/stippling.html [6] https://github.com/Reading-eScience-Centre/ncwms/issues > Many thanks! > > Caspar Ticket Details =================== Ticket ID: BBK-486187 Department: Support THREDDS Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.