2. Neetmaps plugin training: – Qgis2threejs
About the data, what is Tellus South West?
The Tellus South West project is a collaborative, environmental survey and research project
funded by the Natural Environment Research Council (NERC) and carried out by a partnership of
the British Geological Survey (BGS), the Centre for Ecology and Hydrology (CEH), the
BritishAntarctic Survey (BAS) and the University of Exeter Camborne School of Mines.
Find out more at http://www.tellusgb.ac.uk/
Lets make a start....
Step 1. Start QGIS and drag and drop the file dsm_ss64ne_5x5km.asc onto the map
canvas. The DSM files contain all the features on the Earth's surface such as trees and
buildings.
Note: You may get a warning about the CRS being undefined. Don't let this put you off as
QGIS should have been configured to default to EPSG:27700 which is the British National
Grid and is the correct map projection for this data.
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3. Neetmaps plugin training: – Qgis2threejs
You should see a greyish layer on the map canvas and the layer control should look like
the screen shot below.
Step 2. Next, choose the Raster menu and select Terrain Analysis > Relief
Step 3. Complete the following dialog choosing a suitable name for the output layer. I have
called it dsm_ss64ne_Relief. Leave all other values set to their defaults (we will create
Relief colours in the next section).
We will use the newly created relief layer to place on top of the dsm (you can play around
with various transparencies, 50% seems to work well).
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4. Neetmaps plugin training: – Qgis2threejs
The LiDAR data is beginning to take shape now but the DSM can be enhanced by
changing the following layer properties....
Step 4. Go to Layer Properties (of the DSM) and Style and choose the following options.
Now press Classify and OK.
Step 5. Click and drag the DSM layer underneath the Relief layer if it's not already.
View the data in 3d using the Qgis2threejs plugin....
The plugin creates an html page which includes the controls and stores all the data in a
javascript file.
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6. Neetmaps plugin training: – Qgis2threejs
Try experimenting with different resolutions and resampling settings. If you push the
resampling to its highest setting and choose a resolution of 400% you will get some really
impressive results.
Be warned though, this can lead to big files and processing times!
Further ideas...
You could also add a point layer and use that to visualise on the 3d surface. This could
simulate a proposed Wind Turbine development or new Power line.
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