Support for measured geometries in drivers

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

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 "no data" (value < -10³⁸) value for M is not observed.
• The range of M is not written

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