wxGUI location wizard imports 3D Shapefile as 2D

[marisn]

When creating a new location based on a Shapefile, location wizard imports it into the new location, still it's done in 2D mode thus losing all Z coordinates of dataset.

This is worse than not importing at all as when user is forced to use import module (v.in.ogr), it might notice -z option and enable it. Current behaviour might lead to data loss (delete shapefile without checking metadata in GRASS) or wrong conclusions that GRASS doesn't support 3D shapefiles (WRONG!).

[martinl]

Probably v.in.ogr in GRASS 7 could import 3D data automatically when OGR layer is detected as 3D (2.5D) without specifying any extra flag (in other words, no need for -z flag).

[mmetz]

Replying to martinl:

Probably v.in.ogr in GRASS 7 could import 3D data automatically when OGR layer is detected as 3D (2.5D) without specifying any extra flag (in other words, no need for -z flag).

Done in r54189. By default, a 3D vector is created if any input geometry is 3D, otherwise the output is 2D. 2D output can be forced with the new -2 flag (I have seen shapefiles that are 3D even if all z coordinates are zero, thus fake 3D). The -z flag has been removed.

Markus M