[GIS] Add Surface Information alternatives in QGIS

3d-analystqgisraster

Is anyone aware of a single tool or possible routine of tools in QGIS (2.6) which emulate the results of the ESRI 3D Analyst tool 'Add Surface Information'? I have several polygon shapefiles (some with 1000+ features) I am trying to tag with information from a LiDAR-derived raster.

As a bare minimum, I am wanting to extract MIN and MAX elevations, but would also like to grab MEAN elevations and SLOPE information from the raster.

TO UPDATE: I've recently stumbled across the Zonal Statistics plugin which produces MEAN values for raster data within a set polygon(s). Am still searching for a plugin to generate SLOPE data.

Best Answer

There is an alternative in QGIS, you must use SAGA´s tool "Add raster values to points"

Related Solutions

[GIS] Add Surface Information in 3d-analyst

maybe you should take a look at the extraction tool set in the spatial analysis toolbox .... if you have that extension :). The extract by points might be what your looking for. Failing that you could always try a cheeky work around by converting your surface data to polygons and doing a spatial join on the point data. Good luck.

[GIS] Automatisation of Zonal Statistics with python script

Soo I just found the solution for the 2)a) if someone once needs it, I added those lines :

from PyQt4.QtGui import *
from PyQt4.QtCore import *
from qgis.core import *
from qgis.utils import iface

Then it ran but nothing changed. After re-opening Python the column was created !!!

And one last thing : Be careful to Reload AND import again your script for each change (pretty heavy)

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Related Solutions

[GIS] Add Surface Information in 3d-analyst

[GIS] Automatisation of Zonal Statistics with python script

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