Introduction

QGIS is used to view the aerial image and elevation data of the model.

Method

Set up a workspace to contain aerial imagery and elevation data of the model in correct projection.

Set the projection of the workspace:
- Go to Project > Properties.
- In the CRS tab, type 'WGS 84 / UTM zone 60S'.
- Select the matching projection in the 'Predefined Coordinate Reference Systems' section.
- Click 'Apply' and 'OK'.
Check that the projection is set correctly by viewing the bottom right hand corner of the workspace. It should read 'EPSG:32760'.

Bring in the Aerial, either:
- From the Aerial_Photos>>Flood_Modeller folder, drag and drop the Aerial_Photo_M01.jpg file into the workspace; or
- Select Layer > Add layer > Add Raster Layer and navigate to the Aerial_Photos>>Flood_Modeller folder.

Bring in the DEM, either:
- From the DEMs>>Flood_Modeller folder, drag and drop the dem_m01.asc.tif file into the workspace; or
- Select Layer > Add layer > Add Raster Layer and navigate to the DEMs>>Flood_Modeller folder.
Change the symbology of the DEM:
- Right click on the DEM file in the Layers panel and select 'Properties'.
- From the Symbology tab, under 'Band Rendering' select the following options:
Render type: Singleband pseudocolor

Color ramp: Spectral

Color ramp: Invert Color Ramp

Mode: Equal Interval
- From the Transparency tab, set the Global Opacity to 75%.
- Click 'Apply' and 'OK'.
Include a Hillshade of the DEM:
- Right click on the DEM file in the Layers panel and select 'Duplicate Layer'.
- Right click on the DEM_copy and select 'Rename Layer'. Rename the layer to DEM_Hillshade.
- Right click on the DEM_Hillshade file and select 'Properties'.
- From the Symbology tab, under 'Band Rendering' select the following options:
Render type: Hillshade

Z Factor: 3
- From the Transparency tab, set the Global Opacity to 35%.
- Click 'Apply' and 'OK'.

The workspace was set up to contain an aerial image and DEM of the site in the correct projection.

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