[Qgis-user] delimited text point cloud color attribute ?

[Chris Crook]

You can do this by using a data defined properties.

Go in to layer properties
Select the Style tab
Pick a single symbol as the marker type
In the bottom left of the dialog is the symbol layers panel.
Click the "Simple marker"
Then in the panel to the right click "Data defined properties"
This will bring up the data defined properties dialog box
Click the fill color check box, and then click the [...] button to the right of it (expression)
This will get you into the Expression string builder
Click on the Color> group to expand it out, then enter the following in the "Expression box"

color_rgb("R","G","B")


Then click Ok as many times as necessary to get out .. this should do it.

Sounds complicated, but makes more sense when you do it than when you try to write it down!

CHeers
Chris




________________________________________
From: friedtj at free.fr [friedtj at free.fr]
Sent: 21 June 2014 19:32
To: Qgis-user at lists.osgeo.org
Subject: [Qgis-user] delimited text point cloud color attribute ?

I am sure this is a trivial question by I am unable to locate the solution on the
web after a couple of days of searching :
I have a point cloud defined with coordinates and RGB color attributes, ie a file with

X            Y            Z            R   G   B
508.71444702 255.17164612 316.63302612 254 254 254
508.85519409 255.27404785 316.73541260 254 254 254
508.86724854 255.21253967 316.71292114 252 254 254
508.92807007 255.21278381 316.73757935 247 251 253

I can load this file using the Add Delimited Text Layer tool, and at the moment I
use the Z elevation attribute to color my point cloud in QGis (Properties -> Graduated
in Symbol option and Column = Z). I would like now each point to be colored by the RGB
attribute: how can I do this ? I know this is trivial for raster layers, but I cannot
find the solution for a vector layer.

Thanks, Jean-Michel


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