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

Display M and ZM geometries as such in ogrinfo output : ​https://lists.osgeo.org/pipermail/gdal-dev/2016-February/043734.html

ogr2ogr :

• extend -dim to support xy, xyz, xym, xyzm ?
• extend -nlt to support PolygonM, PolygonZM, etc... ?

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
• Shapefiles which use the "no data" (value < -10^{38) should (perhaps) skip M coordinate.}
• There is no mechanism to switch between the legacy style XYZ and XYZM (M set to "no data") formats.

Existing tests

• pass without changes (changes were undone)

New tests

• swig/perl/t/00-measures-03.t pass

Documentation

• Some changes committed referring to changes in version 2.1 but they need to be reviewed

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