[Qgis-user] Convert 3d polyline to 2d QGIS while retaining Z value in your Attributes table

[Andreas Neumann]

Hi Eddisson?

Which z value? In your example you have different z-values attached to 
vertices, but you can only hold a single z-value per record.

There are expressions like z(feature) that work on points, and there are 
expressions like point_n(LineStringGeom) to access a certain node. With 
this, you could say extract the z-values of the first node of a feature.

Getting an aggregate (say mean z-value) of all nodes would be more 
complex and I am not sure if it can be done without Python.

Andreas


On 15.09.2017 16:37, Eddison Araya wrote:
> Hello! a pleasure to greet Do you know how to convert a 3d polyline 
> shapefile to a 2D and keep the Z value in your attribute table? Thank you
>
> Imágenes integradas 1
>
>
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