Difference between revisions of "Tutorial M02 002 Check Files QGIS"
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= Method = | = Method = | ||
This tutorial introduces: | This tutorial introduces: | ||
| − | :*[[Check_Files_2d_DEM_Z | _DEM_Z. | + | :*[[Check_Files_2d_DEM_Z | _DEM_Z.tif]] |
:*[[Check_Files_2d_sh_obj | _sh_obj_check_R.shp]] | :*[[Check_Files_2d_sh_obj | _sh_obj_check_R.shp]] | ||
| − | :*[[Check_Files_2d_DEM_M | _DEM_M. | + | :*[[Check_Files_2d_DEM_M | _DEM_M.tif]] |
Review the check files: <br> | Review the check files: <br> | ||
<ol> | <ol> | ||
<li>Open the following files from the '''Module_02\TUFLOW\check''' folder: | <li>Open the following files from the '''Module_02\TUFLOW\check''' folder: | ||
| − | :*'''M02_5m_001_DEM_Z. | + | :*'''M02_5m_001_DEM_Z.tif''' |
| − | :*'''M02_5m_002_DEM_Z. | + | :*'''M02_5m_002_DEM_Z.tif''' |
:*'''M02_5m_002_sh_obj_check_R.shp''' | :*'''M02_5m_002_sh_obj_check_R.shp''' | ||
<li>Use the 'Apply TUFLOW Styles to Open Layers'. | <li>Use the 'Apply TUFLOW Styles to Open Layers'. | ||
| Line 43: | Line 43: | ||
<br> | <br> | ||
<li>Open the following file from the '''Module_02\TUFLOW\check''' folder: | <li>Open the following file from the '''Module_02\TUFLOW\check''' folder: | ||
| − | :*'''M02_5m_002_DEM_M. | + | :*'''M02_5m_002_DEM_M.tif''' |
<li>Right click on the DEM_M file and select 'Properties'. | <li>Right click on the DEM_M file and select 'Properties'. | ||
<li>From 'Render Type', select "Palletted/Unique Values'. | <li>From 'Render Type', select "Palletted/Unique Values'. | ||
Revision as of 16:10, 13 April 2023
Introduction
QGIS is used to import the check files and review the modified elevations between both model runs.
Method
This tutorial introduces:
Review the check files:
- Open the following files from the Module_02\TUFLOW\check folder:
- M02_5m_001_DEM_Z.tif
- M02_5m_002_DEM_Z.tif
- M02_5m_002_sh_obj_check_R.shp
- Use the 'Apply TUFLOW Styles to Open Layers'.
- The DEM_Z grid shows the final elevations including any topographic modifications used for the model calculations.
- The sh_obj_check file displays the TIN triangles created by TUFLOW during the model initialisation and is useful to review for all merge polygons.
- Use the Profile Tool plugin to compare the DEM_Z files from both model runs.
- The first no merge region raises all elevation points to a single value.
- The second no merge region adds a specified value to all elevation points.
- The merge region used for the farm dam rehabilitation interpolates between all perimeter elevation points.
- The merge region with negative Shape_Option attribute cuts through the embankment. The manually added vertices allow the modification to follow the cross section of the channel.
- Zoom to the landscape files and review the TIN triangles and elevations created by the points, line and region using the merge option.
- Open the following file from the Module_02\TUFLOW\check folder:
- M02_5m_002_DEM_M.tif
- Right click on the DEM_M file and select 'Properties'.
- From 'Render Type', select "Palletted/Unique Values'.
- Click 'Classify', five unique values appear referring to the material specified in the 2d_mat_M02_landscape and materials.csv file. Click 'OK'.
- The DEM_M shows the final material ID values. Change the labels to match the material class as shown below.
Conclusion
- The topographic modifications representing different development sites were assessed using the Profile Tool.
- The DEM_M grid was used to review the land use.
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