= 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