Support for measured geometries in drivers

The support for measured geometries has been implemented in the core for GDAL 2.1.

However, it will take some time for the support to be implemented / work in production ready quality in the drivers.

On this page the work is described.

Utilities

ogr2ogr :

• -dim was extended to support XY, XYZ, XYM, and XYZM (discussion: ​https://lists.osgeo.org/pipermail/gdal-dev/2016-February/043728.html)
• -nlt now supports M and ZM suffixes thanks to enhancement to OGRFromOGCGeomType

ogrinfo:

• -geom was extended to support WKT and ISO_WKT and the latter was set as the default (discussion: ​https://lists.osgeo.org/pipermail/gdal-dev/2016-February/043734.html)

Memory

Status

• Implemented, no known issues

Existing tests

• pass

New tests

• swig/perl/t/00-measures-02.t pass

Documentation

• to be done

ESRI Shapefile

Status

• Implemented
• The range of M is not written (Note E. Rouault: is it true ?)

Existing tests

• pass without changes (changes were undone)

New tests

• swig/perl/t/00-measures-03.t pass

Documentation

• Support for measures is mentioned, also the SHPT creation option list is updated.

PostgreSQL

Status

• Implemented

Existing tests

• pass

New tests

• swig/perl/t/00-measures-04.t pass (also for PostGIS 1.5.8)

Documentation

• to be done

Other drivers

Implemented in CSV, VRT, SQLite/Spatiliate, PGDump, GPKG, FileGDB / OpenFileGDB