How to change WFS projection request?

[jesolis1]

Hi,
I would find it very helpful to know how to change the projection when making a Web Feature Service (WFS) request specifically in the WFS request body. Currently, my body request generates something like this:

<GetFeature xmlns="http://www.opengis.net/wfs" service="WFS" version="1.1.0" outputFormat="text/xml; subtype=gml/2.1.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd">
    <Query typeName="POLYGON_MAP_CITY" srsName="EPSG:4326">
        <Filter xmlns="http://www.opengis.net/ogc">
            <Intersects>
                <PropertyName>geom</PropertyName>
                <Point xmlns="http://www.opengis.net/gml">
                    <pos srsDimension="2">-121.448434 36.505518</pos>
                </Point>
            </Intersects>
        </Filter>
    </Query>
</GetFeature>

Here, the tag has the default property srsName="EPSG:4326", and the coordinates are in that projection. However, my data source only works with srsName="EPSG:32614". I’d prefer not to manipulate the request manually to reproject the data.

Since the WMS layer I’m querying already has "EPSG:32614" defined and works correctly (e.g., the GeoMoose 3.13.1 generates valid WMS requests but the "Identify" tool generates invalid requests to data source), why does the WFS service default to a different projection than the data source (MapServer)? And how can I change the default projection in the WFS service to match?

E.g. since Mapbook:

    <map-source name="wfs_city" type="mapserver-wfs">
        <config name="pixel-tolerance" value="0"/>
        <param name="typename" value="POLYGON_MAP_CITY"/>
        <param name="service" value="WFS"/>
        <file>city_indicators.map</file>      
        <layer name="POLYGON_MAP_CITY" selectable="true">
            <param name="SCALE" value="1"/>
            <template name="identify" auto="true" />
        </layer>
    </map-source>
    <map-source name="CityIndicators" type="mapserver" up="true" down="true" title="City Indicators">
        <file>city_indicators.map</file>
        <layer name="POLYGON_MAP_CITY" query-as="wfs_city/POLYGON_MAP_CITY" status="on"/>
        <param name="SCALE" value="1"/>
    </map-source>

[elil]

I'm not quite sure that I'm following the issue but this may relate to the order and method of listing projections in ows_srs and wfs_srs in the .map file, see also #346

[tchaddad]

You didn't post the contents of your "city_indicators.map" file but if you are using a map file then you must be using MapServer to either serve, or reach your WFS service. Is that correct?

If the WFS is remote, then you might be able to set your map file to make the request from the source in EPSG:32614, and return the result to GeoMoose in EPSG:4326, which should achieve what you need.

If you are following the example in the GeoMoose Demo, there is an INCLUDE in the examples that brings in some common metadata .

Check the lines that list the supported SRS, and make sure that your projection is included, but that EPSG:4326 is first in the line :

'ows_enable_request'  '*'
'ows_srs' 'EPSG:4326 EPSG:32614 EPSG:3857'
'wfs_srs' 'EPSG:4326 EPSG:32614 EPSG:3857'

Then in the LAYER that defines the WFS, make sure that you define the projection of the source as

  PROJECTION
    "init=epsg:32614"
  END

[klassenjs]

This is what the wgs84Hack=true flag that is part of ‘mapserver-wfs’ does. It forces the identify/search SRS to 4326 instead of the main projection. I don’t remember why we needed that as a work around. If the wgs84Hack is not set (using type=wfs) it requests as you want. (But since that hack is there for a reason, I don’t expect it to work)

…

On Fri, May 30, 2025 at 18:59 TC Haddad ***@***.***> wrote: *tchaddad* left a comment (geomoose/gm3#903) <#903 (comment)> You didn't post the contents of your "city_indicators.map" file but if you are using a map file then you must be using MapServer to either serve, or reach your WFS service. Is that correct? If the WFS is remote, then you might be able to set your map file to make the request from the source in EPSG:32614, and return the result to GeoMoose in EPSG:4326, which should achieve what you need. If you are following the example in the GeoMoose Demo, there is an INCLUDE in the examples that brings in some common metadata <https://github.com/geomoose/gm3-demo-data/blob/main/common_metadata.map> . Check the lines that list the supported SRS, and make sure that your projection is included, *but that EPSG:4326 is first in the line* : 'ows_enable_request' '*' 'ows_srs' 'EPSG:4326 EPSG:32614 EPSG:3857' 'wfs_srs' 'EPSG:4326 EPSG:32614 EPSG:3857' Then in the LAYER that defines the WFS, make sure that you define the projection of the source as PROJECTION "init=epsg:32614" END — Reply to this email directly, view it on GitHub <#903 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABIN5VUZN4HVYPJT2C3MTL3BDWGLAVCNFSM6AAAAAB6JA7PISVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDSMRTG42TEOBRGY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>