[Qgis-user] Point order in WKT export from polygon layer

[Ian Turton]

I don't think the OGC specify a winding order, since WKT is explicit about
exterior and interior rings.

If you are looking at the unregulated geojson standard again I don't think
it specifies a winding order but it's been a while since I read that one
and I'm on my phone just now so I can't check. But it would be worth
looking at the RFC and pointing to the relevant section.

Ian

On Mon, 5 Aug 2024, 13:40 Reetz, Michael (NLPVW) via QGIS-User, <
qgis-user at lists.osgeo.org> wrote:

> Dear list,
>
>
>
> I’ve created a csv-file with coordinates in WKT-format by exporting a
> polygon layer with the “Save object as …”-option (“Objekte speichern als …”
> in the German QGIS version). I need this for querying data from GBIF via
> their API using JSON input. That has worked for the last years. But using
> the same JSON files this year gives an error because the point order is
> clockwise. I’ve found that according to the OGC standard the order should
> be counter clockwise for polygons and clockwise for excluded areas inside a
> polygon. It seems as if GBIF is following this standard now.
>
>
>
> Would it be possible to follow the OGC standard in the QGIS export, too?
> This would reduce the amount of rework after each export.
>
>
>
> Best regards
>
> Michael
>
>
>
>
>
> Mit freundlichen Grüßen
>
> Im Auftrag
>
>
>
> Michael Reetz
>
>
>
> *****************************************
>
> Michael Reetz
>
> Datenbanken und Anwendungsentwicklung
> Nationalpark-Verwaltung Niedersächsisches Wattenmeer
> Virchowstr. 1 | 26382 Wilhelmshaven
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> e-mail: michael.reetz at nlpvw.niedersachsen.de
> <michael.reetz at nlpv-wattenmeer.niedersachsen.de>
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> <http://nationalpark-wattenmeer.de>*
>
>
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