[gdal-dev] Ogrinfo, WKT and geometries with Z

[Jukka Rahkonen]

Hi,

Ogrinfo is printing the WKT of XYZ geometries this way:

ogrinfo polygonz.gpkg -al
INFO: Open of `polygonz.gpkg'
      using driver `GPKG' successful.

Layer name: polygonz
Geometry: Unknown (any)
Feature Count: 1
Extent: (340.000000, 420.000000) - (560.000000, 580.000000)
Layer SRS WKT:
(unknown)
FID Column = fid
Geometry Column = geom
OGRFeature(polygonz):1
  POLYGON ((340 580 1,560 580 2,560 420 3,340 580 1))


In "OpenGIS® Implementation Standard for Geographic information - Simple
feature access - Part 1: Common architecture" POINT is defined as 2
dimensional. Wouldn't the right WKT be
  POLYGON Z ((340 580 1,560 580 2,560 420 3,340 580 1)) ?

I have tested that some software like OpenJUMP and PostGIS do accept POLYGON
with 3 coordinates while some other like Spatialite do not. Because Ari is
now working with XYZ(M) code would this also be worth a review?

-Jukka Rahkonen-