RussellGardner at 15:56, 29 September 2025

2025-09-29T15:56:13Z

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	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional# \| Back to Module 1 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#GIS and Model Inputs \| Back to Module 1 Main Page]]
	}}		}}

RussellGardner: Created page with "= 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..."

2025-09-26T14:40:44Z

Created page with "= 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..."

New page

= 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 ===
<ol>
<li>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'.
<li>Check that the projection is set correctly by viewing the bottom right hand corner of the workspace. It should read 'EPSG:32760'. 
 
{{Video|name=Animation_M01_Projection_a.mp4|width=1279}} 
 
</ol>

=== Aerial Image ===
<ol>
<li>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.
 
{{Video|name=Animation_M01_Aerial_01a.mp4|width=1279}} 
 
</ol>

=== Elevation Data===
<ol>
<li>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.
<li>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'.
 
{{Video|name=Animation_M01_DEM_01d.mp4|width=1279}} 
 
<li>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'.
 
{{Video|name=Animation_M01_DEM_02c.mp4|width=1279}} 
 
</ol>

= Conclusion =
:*The workspace was set up to contain an aerial image and DEM of the site in the correct projection. 
 
{{Tips Navigation
|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional# | Back to Module 1 Main Page]]
}}

Model Familiarisation QGIS - Revision history

RussellGardner at 15:56, 29 September 2025

RussellGardner: Created page with "= 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..."

RussellGardner: Created page with "= 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..."