[QGIS-Developer] WFS3 API POST PUT Methods

[Carlo A. Bertelli (Charta s.r.l.)]

The GeoJSON Specification (RFC 7946) mandates the use of WGS84:

The coordinate reference system for all GeoJSON coordinates is a
> geographic coordinate reference system, using the World Geodetic
> System 1984 (WGS 84) [WGS84
> <https://datatracker.ietf.org/doc/html/rfc7946#ref-WGS84>] datum, with
> longitude and latitude units
> of decimal degrees.

(chapter 4)

OAPIF can use GeoJSON (very often) and in this case using another reference
system is not allowed, but it can also use GML level 0 or level 2 and in
these cases there is no limit to what CRS you can use.


On Wed, Mar 2, 2022 at 6:09 PM Alessandro Pasotti <apasotti at gmail.com>
wrote:

>
> Enrico,
>
> We only accept 4326 currently.
>
> I think we could be more tolerant if the OAPIF extensions allows it, we
> currently allow GET with other CRSs but POST/PUT/PATCH are not implemented
> to handle different CRSs.
>
> Kind Regards
>
>
> On Wed, Mar 2, 2022 at 1:53 PM Enrico Ferreguti <enricofer at gmail.com>
> wrote:
>
>> Hi QGIS devs,
>> I'm testing the API REST interface for updating a WFS3 and I verified
>> that the new/modified feature had to be expressed in geojson format in
>> EPSG:4326 coordinates regardless of the SRID of the served layer. I
>> verified the behaviour with QGIS server 3.16 LTR and latest 3.22
>>
>> Is this an issue or a feature due to compliance to OGC or RFC7946
>> standards?
>>
>> Anyway I found this behaviour very uncomfortable because it obliges to
>> perform preliminarly unaccurate reprojections from javascript/python
>> clients.
>>
>> Best regards.
>> Enrico Ferreguti.
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>
>
> --
> Alessandro Pasotti
> QCooperative:  www.qcooperative.net
> ItOpen:   www.itopen.it
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