Hi, I could not access your sample images. I do not know if demo.mapserver.org is GPKG based, but I do not see any difference between these two outputs:
https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.1.0&REQUEST=GetMap&BBOX=4.735,33.118,8.641,38.769&SRS=EPSG%3A4326&WIDTH=490&HEIGHT=709&LAYERS=cities&STYLES=&FORMAT=image%2Fpng&DPI=144&MAP_RESOLUTION=144&FORMAT_OPTIONS=dpi%3A144&TRANSPARENT=TRUE https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=33.118,4.735,38.769,8.641&CRS=EPSG%3A4326&WIDTH=490&HEIGHT=709&LAYERS=cities&STYLES=&FORMAT=image%2Fpng&DPI=144&MAP_RESOLUTION=144&FORMAT_OPTIONS=dpi%3A144&TRANSPARENT=TRUE -Jukka Rahkonen- ________________________________________ Lähettäjä: MapServer-users <[email protected]> käyttäjän Philippe Ghesquiere via MapServer-users <[email protected]> puolesta Lähetetty: Keskiviikko 18. helmikuuta 2026 11.37 Vastaanottaja: MapServer Users <[email protected]> Aihe: [MapServer-users] WMS with a GPKG-based layer : different responses, dependending on version (1.1.1 vs 1.3.0) Hi all,1) Problem description:Our system is offering an OSM layer, based on a WGS84 GPKG (Z=0 to Z=13).I sent two WMS requests, where the only difference is the standard version :WMS V1.1.1 request:https://xxx/layers/baselayers/wms?service=WMS&version=1.1.1&request=GetMap&Layers=osm_4326&Styles=&SRS=EPSG:4326&Format=image/png&BBOX=45,22.5,67.5,45&Width=1024&Height=1024WMS V1.3.0 request:https://xxx/layers/baselayers/wms?service=WMS&version=1.3.0&request=GetMap&Layers=osm_4326&Styles=&CRS=EPSG:4326&Format=image/png&BBOX=22.5,45,45,67.5&Width=1024&Height=1024 I observe some differences :V1.1.1: https://pasteboard.co/JjKbU4yvSxrM.png,Labels are easy to read: mapcache/mapserver is selecting the right zoom level in the GPKG file.V1.3.0: https://pasteboard.co/XzpHSJjSTiQV.png.Labels are much too small and not readable. It seems that mapcache/mapserver is selecting a higher zoom level than expected and down-sample the image.I do not understand why the rendering is not the same.As far as I know, WMS requests do not have standard parameters which give a *direct* access to zoom layer, resolution or DPI.I tried to add some parameters to my request, with no impact on the response: DPI=240MAP_RESOLUTION=240FORMAT_OPTIONS=dpi:240.I also tried to add parameters in the "MAP block":RESOLUTIONDEFRESOLUTION2) Software environment:Mapserver 8.2.0Mapcache 1.14.0Gdal V3.8.4Alma Linux V83) Map file excerptMAP NAME "baselayers_wms" STATUS ON SIZE 256 256 EXTENT -180.0 -90.0 180.0 90.0 UNITS dd# DEFRESOLUTION 200# RESOLUTION 144 PROJECTION "init=epsg:4326" END4) My questions:Why do I get different responses between V1.1.1 and V1.3.0 WMS requests ?Are there any configuration parameters which have default values in one version and not in the other ?I would be glad to have some hints to get better WMS 1.3.0 responsesSincerelyPhilippeThe 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.Airbus cannot accept any responsibility for the accuracy or completeness of this e-mail as it has been sent over public networks. If you have any concerns over the content of this message or its Accuracy or Integrity, please contact Airbus immediately.All outgoing e-mails from Airbus are checked using regularly updated virus scanning software but you should take whatever measures you deem to be appropriate to ensure that this message and any attachments are virus free. _______________________________________________ MapServer-users mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/mapserver-users
