Allow WFS query return to be in EPSG:4326

[brentfraser]

Currently the WFS server must return query info (feature geometry) in EPSG:3857 (I think). It should be possible to have GM request, and accept features returned in EPSG:4326, and re-project, and render them on the map.

Here's a data source:
https://mrdata.usgs.gov/services/wfs/sgmc2?service=WFS&version=1.1.0&request=GetCapabilities&

[brentfraser]

The the data web page:
https://mrdata.usgs.gov/geology/state/state.php?state=MN
(note there is an error in its WFS link)

[klassenjs]

Note: MapServer can re-project a WFS on the fly.

[brentfraser]

That's true. I was thinking more for servers I have no control over.

[brentfraser]

And would rather not proxy the stream through my mapserver, although it's good to have the option.

[brentfraser]

Might be addressed in #787

[brentfraser]

Using the recent PR #787 I crafted a mapsource to test this issue (note the map-source attribute src-proj ):

    <map-source name="issue542"                    type="wfs" src-proj="EPSG:4326" title="Issue 542">
        <url>https://mrdata.usgs.gov/wfs/sgmc2</url>
        <param name="cross-origin" value="anonymous"/>
        <param name="typename" value="ms:Structure"/>
        <param name="srsname"  value="EPSG:4326"/>
        <layer name="Structure" >
            <style><![CDATA[
            {
                "circle-radius": 4,
                "circle-color": "#fec44f",
                "fill-color": "#fec44f",
                "circle-stroke-color": "#d95f0e",
                "line-color": "blue",
                "line-width": 2,
                "fill-opacity": 0.20,
                "line-opacity": 0.80,
                "text-field_COMMENTED-OUT": "{OWNER_NAME}",
                "text-color": "#000000"
            }
            ]]></style>
            <template name="identify" auto="true" />
        </layer>
    </map-source>

While the server now seems to respond with valid features in GML format, OL's loadfeatures doesn't return features. Am I missing some parameter?

FYI here's a sample URL sent by GeoMoose if you'd like to examine the result:

https://mrdata.usgs.gov/wfs/sgmc2?srsname=EPSG:4326&outputFormat=text/xml; subtype=gml/2.1.2&service=WFS&version=1.1.0&request=GetFeature&bbox=-10394257.459583912,5522710.745672788,-10346790.065018818,5579197.709575533,EPSG:3857&cross-origin=anonymous&typename=ms:Structure

[theduckylittle]

T'was a projection issue. Not sure if there were changes to how to specify this properly between OL3.x and now or if we were doing it wrong all along and things worked by accident. The latest changes in #787 should address the problem.