Difference between revisions of "Tutorial Site Familiarisation QGIS"
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:*Select the matching projection in the 'Predefined Coordinate Reference Systems' section. | :*Select the matching projection in the 'Predefined Coordinate Reference Systems' section. | ||
:*Click 'Apply' and 'OK'. | :*Click 'Apply' and 'OK'. | ||
| − | <li>Check that the projection is set correctly by viewing | + | <li>Check that the projection is set correctly by viewing the bottom right hand corner of the workspace. It should read 'EPSG:32760'.<br> |
<br> | <br> | ||
| − | + | {{Video|name=Animation_M01_Projection_a.mp4|width=1279}}<br> | |
<br> | <br> | ||
</ol> | </ol> | ||
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:*Select Layer > Add layer > Add Raster Layer and navigate to the '''Aerial_Photo''' folder. | :*Select Layer > Add layer > Add Raster Layer and navigate to the '''Aerial_Photo''' folder. | ||
<br> | <br> | ||
| − | + | {{Video|name=Animation_M01_Aerial_01a.mp4|width=1279}}<br> | |
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:*Select Layer > Add layer > Add Raster Layer and navigate to the '''DEM''' folder. | :*Select Layer > Add layer > Add Raster Layer and navigate to the '''DEM''' folder. | ||
<li>Change the symbology of the DEM: | <li>Change the symbology of the DEM: | ||
| − | :*Right click on the DEM file in the Layers panel and select 'Properties'. | + | :*Right click on the '''DEM''' file in the Layers panel and select 'Properties'. |
:*From the Symbology tab, under 'Band Rendering' select the following options: | :*From the Symbology tab, under 'Band Rendering' select the following options: | ||
::*Render type: Singleband pseudocolor | ::*Render type: Singleband pseudocolor | ||
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:*Click 'Apply' and 'OK'. | :*Click 'Apply' and 'OK'. | ||
<br> | <br> | ||
| − | + | {{Video|name=Animation_M01_DEM_01d.mp4|width=1279}}<br> | |
<br> | <br> | ||
<li>Include a Hillshade of the DEM: | <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''' 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_copy''' and select 'Rename Layer'. Rename the layer to '''DEM_Hillshade'''. |
| − | :*Right click on the DEM_Hillshade file and select 'Properties'. | + | :*Right click on the '''DEM_Hillshade''' file and select 'Properties'. |
:*From the Symbology tab, under 'Band Rendering' select the following options: | :*From the Symbology tab, under 'Band Rendering' select the following options: | ||
::*Render type: Hillshade | ::*Render type: Hillshade | ||
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:*Click 'Apply' and 'OK'. | :*Click 'Apply' and 'OK'. | ||
<br> | <br> | ||
| − | + | {{Video|name=Animation_M01_DEM_02c.mp4|width=1279}}<br> | |
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</ol> | </ol> | ||
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= Conclusion = | = Conclusion = | ||
| − | :*The workspace | + | :*The workspace was set up to contain an aerial image and DEM of the site in the correct projection.<br> |
<br> | <br> | ||
{{Tips Navigation | {{Tips Navigation | ||
|uplink=[[Tutorial_M01#Model_Familiarisation| Back to Module 1 Main Page]] | |uplink=[[Tutorial_M01#Model_Familiarisation| Back to Module 1 Main Page]] | ||
}} | }} | ||
Latest revision as of 16:22, 14 August 2023
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
- 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'.
Aerial Image
- Bring in the Aerial, either:
- From the Aerial_Photo 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_Photo folder.
Elevation Data
- Bring in the DEM, either:
- From the DEM folder, drag and drop the DEM.tif file into the workspace; or
- Select Layer > Add layer > Add Raster Layer and navigate to the DEM 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'.
Conclusion
- The workspace was set up to contain an aerial image and DEM of the site in the correct projection.
- The workspace was set up to contain an aerial image and DEM of the site in the correct projection.
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