[MapServer-dev] Question regarding the WFS client layers support

[Tamas Szekeres]

Hi Devs,

What is the current status of the WFS client support in mapserver? We are
trying to utilize that in a project, but I've run into quite some issues
which make it pretty unusable, like:

1. According to the documentation only WFS 1.0.0 is supported where the SRS
is not provided with the BBOX in the GetFeature queries. (So the server
default SRS has to be used as the layer projection)
2. By using the GET method, WFS 1.1.0 seems to be supported and SRSNAME may
also be provided if the wfs_srs metadata is set. (But this is not
documented)
3. WFS 2.0.0 is not supported entirely.
4. When using EPSG:4326 with the default 1.0.0 (POST) setting, the axis
order is not properly considered when drawing the layers

For example the following layer is rendered vertically:

LAYER
    CONNECTION "
https://sampleserver6.arcgisonline.com/arcgis/services/SampleWorldCities/MapServer/WFSServer
"
    CONNECTIONTYPE WFS
    EXTENT -180 -89.90002441 180.00012207 83.62371826
    METADATA
      "wfs_geometryname" "Shape"
      "wfs_srs" "EPSG:4326"
      "wfs_maxfeatures" "10000"
      "wfs_typename" "esri:Continent"
      "wfs_version" "1.0.0"
    END # METADATA
    NAME "Continent"
    PROJECTION
      "EPSG:4326"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE POLYGON
    UNITS METERS
    CLASS
      NAME "Class (0)"
      STYLE
        COLOR 255 255 255
        OUTLINECOLOR 0 0 0
        SIZE 8
      END # STYLE
      TEMPLATE "query.html"
    END # CLASS
  END # LAYER

But this one seems to be ok:

LAYER
    CONNECTION "
https://sampleserver6.arcgisonline.com/arcgis/services/SampleWorldCities/MapServer/WFSServer
"
    CONNECTIONTYPE WFS
    EXTENT -180 -89.90002441 180.00012207 83.62371826
    METADATA
      "wfs_geometryname" "Shape"
      "wfs_srs" "EPSG:4326"
      "wfs_request_method" "GET"
      "wfs_maxfeatures" "10000"
      "wfs_typename" "esri:Continent"
      "wfs_version" "1.1.0"
    END # METADATA
    NAME "Continent (1)"
    PROJECTION
      "EPSG:4326"
    END # PROJECTION
    STATUS OFF
    TILEITEM "location"
    TYPE POLYGON
    UNITS METERS
    CLASS
      NAME "Class (0)"
      STYLE
        COLOR 255 255 255
        OUTLINECOLOR 0 0 0
        SIZE 8
      END # STYLE
      TEMPLATE "query.html"
    END # CLASS
  END # LAYER

Best regards,

Tamas
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