[gdal-dev] Esri JSON Curves

[Even Rouault]

On vendredi 22 juin 2018 14:38:15 CEST James Klassen wrote:
> I finally got around to doing a rough implementation of parsing ESRIJSON
> with curved geometries.  The code is very rough yet, but works enough to
> import a polygon layer from an ESRI FeatureService into PostGIS with the
> curves intact.  Code is available at [1].
> 
> Main issues:
> 
> I don't know how to detect if there will be curves in the source file
> without first parsing the whole file, so currently I just assume a curved
> geometry type.  This might be a candidate for an open option.

The ESRI Json reader ingests everything in memory and builds the JSon tree 
structure, so doing an initial pass by default shouldn't be a big deal.

> 
> My focus has been on polygon layers (because that's the dataset I need to
> read).  I doubt it works outside of polygon layers at the moment.
> 
> I had to enable the "Curve Geometries" capability in the top level GeoJSON
> driver (which may break some things for the GeoJSON/TopoJSON drivers).

If my memories are right, you only need to set it for write support. So 
shouldn't be needed there.

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