Hi, Could DGWIG WMTS profile offer a workaround?
7.11 Tile File Formats Requirement 10: A DGIWG WMTS server SHALL support at least one of the following raster formats for the GetTile operation: image/png (Portable Network Graphics) image/gif (Graphics Interchange Format) image/jpeg (Joint Photographic Experts Group) So no need to support all three as in the WMS profile. -Jukka Rahkonen- Lähettäjä: MapServer-dev <[email protected]> Puolesta Even Rouault Lähetetty: keskiviikko 13. syyskuuta 2023 20.16 Vastaanottaja: Philippe Ghesquiere <[email protected]> Kopio: MapServer Devs <[email protected]> Aihe: Re: [MapServer-dev] Does mapserver support GIF format for WMS / WMTS services? Le 11/09/2023 à 09:09, Philippe Ghesquiere a écrit : Hi Even, I thought over your answer again during the weekend. You give the right parameters to get a PNG image format; which is fine. However, I do need to offer a GIF format support in order to be compliant to the "DGIWG WMS profile" (OGC 09-102r3). Indeed, requirement #6 says : A DGIWG WMS server shall support the following raster formats for the GetMap operation * image/png, * image/gif, * image/jpeg Do you have any other advice / ideas? - Tell DGIWG folks that the world has moved since the 90's and they should consider moving on ;-) - add middleware between client and mapserver to request png8 to mapserver and convert it back to gif in the middleware - probably easier: enhance mapserver to add back gif support Sincerely Philippe On Fri, Sep 8, 2023 at 4:02 PM Philippe Ghesquiere <[email protected]<mailto:[email protected]>> wrote: Thanks Even & Seth, I will give it a try On Fri, Sep 8, 2023 at 3:02 PM Seth G <[email protected]<mailto:[email protected]>> wrote: I think `WITH_GIF` is only used to read in GIF images (for symbols etc.)? As Even wrote GDAL/GIF doesn't seem to work as an OUTPUTFORMAT. I get: msDrawMap(): Image handling error. Failed to draw layer named 'countries'. msOGRFileNextShape(): OGR error. OGR GetNextFeature() error'd. Check logs -- web:https://geographika.net<https://geographika.net/> & https://mapserverstudio.net<https://mapserverstudio.net/> twitter: @geographika On Fri, Sep 8, 2023, at 2:43 PM, Even Rouault wrote: Philippe, Le 08/09/2023 à 14:16, Philippe Ghesquiere via MapServer-dev a écrit : Hi all, I am a little bit confused with GIF support for WMS/WMTS services. In several parts of the documentation, it is mentioned that GIF support is discarded with the end of the "GD library" support. I noticed the compilation option in CMakelists.txt : option(WITH_GIF "Enable GIF support (for PIXMAP loading)" ON) I do not understand the "for PIXMAP loading" comment. Anyway, our mapserver does not server WMS/WMTS tiles in GIF format. So here are my few questions : * is GIF support enabled by default for WMS/WMTS services ? no * do I need to add the option : -DWITH_GIF=ON for cmake configuration ? only to load raster symbols in GIF format * do I need to add a specific mapserver configuration, like : OUTPUTFORMAT NAME "GIF" DRIVER GDAL/GIF MIMETYPE "image/GIF" IMAGEMODE RGB EXTENSION "gif" END I don't think that will work. The GDAL GIF driver already expects paletted data, not RGB. And I don't think switching IMAGEMODE to PC256 would work since that support has effectively gone. I believe the only option to get paletted data is to use PNG8 with the AGG/PNG8 driver and MIMETYPE="image/png; mode=8bit" Even Thanks for your help and advices Philippe The information in this e-mail is confidential. The contents may not be disclosed or used by anyone other than the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, please notify Airbus immediately and delete this e-mail. 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