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Practical Manual - Malareo

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Task 5: Slope Analysis<br />

<br />

Open a new QGIS project and add the layer called elevation_UTM. This is<br />

a DEM of eThekwini.<br />

Change the CRS of both the layer and the project to Cape/UTM Zone 36S.<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

Zoom to the layer extent.<br />

Open the Properties menu of the layer and change the Color Map to<br />

Psuedocolor. This is in the Style Tab of the Properties window.<br />

This now symbolises the layer to show the altitude differences.<br />

Open the Raster<br />

Based Terrain<br />

Analysis window.<br />

Select Slope as the<br />

Analysis<br />

Select<br />

elevation_UTM as<br />

the input layer.<br />

Give the output a<br />

name and make sure to save in the<br />

correct folder.<br />

Select GeoTIFF as the output<br />

format.<br />

Check Add Result to Project Box<br />

Display the resulting image as a Psuedocolor map.<br />

The resulting image is a raster layer showing<br />

the slopes of the image.<br />

QGIS for Malaria Page 53

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