[postgis-devel] Adding 4D support to asGeoJson

Sandro Santilli strk at kbt.io
Tue Jan 30 22:39:29 PST 2018

On Tue, Jan 30, 2018 at 06:00:21PM -0500, Alexandre Lessard wrote:
> On 2018-01-30 17:25, Paul Ramsey wrote:
> > https://tools.ietf.org/html/rfc7946#section-3.1.1
> > 
> > "Implementations SHOULD NOT extend positions beyond three elements
> > because the semantics of extra elements are unspecified and
> > ambiguous."
> > 
> > Do we really want to go there?
> The original GeoJson spec allowed it and openlayers already treats the
> fourth dimension as the measure, using a XYZM layout.
> I can't think of better way to pass the M data from postgis to a client app
> such as openlayers than through GeoJson.

Maybe add an optional function argument to request the kind of
standard, as we have for WKT (ISO, OGC, Extended) ?


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