[QGIS-Developer] CRS for GeoJson Data

[C Hamilton]

Given that the GeoJSON standard specifies WGS84 shouldn't that be the
default that QGIS uses when it saves a GeoJSON file? I guess there could be
an option that would allow legacy GeoJSON files. What would it take to have
QGIS always save WGS84 by default?

For now I am updating Lat Lon Tools to support GeoJSON points. For my
purposes I will stick by the standard and not worry about alternative CRS
GeoJSON files.

Calvin

On Wed, Nov 22, 2017 at 5:23 PM, Even Rouault <even.rouault at spatialys.com>
wrote:

> On mercredi 22 novembre 2017 15:08:08 CET Tom Chadwin wrote:
>
> > I remember irritated tweets from someone like Sean Gillies involved the
> spec
>
> > about how projected CRSes had no place in GeoJSON.
>
> >
>
>
>
> The last year standardized version of GeoJSON, IETF RFC7946, mentions in
>
> https://tools.ietf.org/html/rfc7946#page-12
>
>
>
> """
>
> The coordinate reference system for all GeoJSON coordinates is a
>
> geographic coordinate reference system, using the World Geodetic
>
> System 1984 (WGS 84) [...]
>
> Note: the use of alternative coordinate reference systems was
>
> specified in [GJ2008], but it has been removed from this version of
>
> the specification [...]
>
> """
>
>
>
> Regarding OGR, it will support reading & writing GeoJSON files with any
> CRS. Unless that on the write side you specify RFC7946=YES as layer
> creation option, in which case automatic reprojection to WGS84 is done.
>
>
>
> Even
>
>
>
> --
>
> Spatialys - Geospatial professional services
>
> http://www.spatialys.com
>
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