Difference between revisions of "Tutorial M02 002 Check Files QGIS GPKG"

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<span style="color:#FF0000">
 
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<font size = 18>Page Under Construction</font>
 
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= Introduction =
 
= Introduction =
 
QGIS is used to import the check files and review the modified elevations between both model runs. <br>
 
QGIS is used to import the check files and review the modified elevations between both model runs. <br>
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Review the check files: <br>
 
Review the check files: <br>
 
<ol>
 
<ol>
 +
<li>Open the file, either:
 +
:*Within the QGIS Browser Panel, navigate to '''Module_02\TUFLOW\check\M02_5m_002_Check.gpkg''' and double click the following layer, or
 +
::*'''M02_5m_002_sh_obj_check_R'''
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:*In File Explorer, navigate to the '''Module_02\TUFLOW\check''' folder, drag and drop the '''M02_5m_002_Check.gpkg''' into the QGIS workspace and select the layer above.
 
<li>Navigate to the '''Module_02\TUFLOW\check''' folder and open the following layers into QGIS:
 
<li>Navigate to the '''Module_02\TUFLOW\check''' folder and open the following layers into QGIS:
 
:*'''M02_5m_001_DEM_Z.tif'''
 
:*'''M02_5m_001_DEM_Z.tif'''
 
:*'''M02_5m_002_DEM_Z.tif'''
 
:*'''M02_5m_002_DEM_Z.tif'''
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<li>Drag and drop '''M02_5m_002_Check.gpkg''' into QGIS and select the '''M02_5m_002_sh_obj_check_R''' layer.
 
 
<li>Use the 'Apply TUFLOW Styles to Open Layers'.
 
<li>Use the 'Apply TUFLOW Styles to Open Layers'.
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<li>Use tge 'Apply GPKG Layer Names'.
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<li>Use the 'Apply GPKG Layer Names'.
 
<li>The DEM_Z grid shows the final elevations including any topographic modifications used for the model calculations.
 
<li>The DEM_Z grid shows the final elevations including any topographic modifications used for the model calculations.
 
<li>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.
 
<li>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.
 
<li>Use the Profile Tool plugin to compare the DEM_Z files from both model runs. <br>
 
<li>Use the Profile Tool plugin to compare the DEM_Z files from both model runs. <br>
 
<br>
 
<br>
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[[File:Animation M02 Check 002 01.gif]]<br>
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{{Video|name=Animation_M02_Check_002_01.mp4|width=1279}}<br>
 
<br>
 
<br>
 
<li>The first no merge region raises all elevation points to a single value.<br>
 
<li>The first no merge region raises all elevation points to a single value.<br>
 
<br>
 
<br>
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[[File:Animation M02 Check 002 03.gif]]<br>
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{{Video|name=Animation_M02_Check_002_03.mp4|width=1279}}<br>
 
<br>
 
<br>
 
<li>The second no merge region adds a specified value to all elevation points.<br>
 
<li>The second no merge region adds a specified value to all elevation points.<br>
 
<br>
 
<br>
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[[File:Animation M02 Check 002 02.gif]]<br>
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{{Video|name=Animation_M02_Check_002_02.mp4|width=1279}}<br>
 
<br>
 
<br>
 
<li>The merge region used for the farm dam rehabilitation interpolates between all perimeter elevation points.<br>
 
<li>The merge region used for the farm dam rehabilitation interpolates between all perimeter elevation points.<br>
 
<br>
 
<br>
−
[[File:Animation M02 Check 002 04b.gif]]<br>
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{{Video|name=Animation_M02_Check_002_04b.mp4|width=1279}}<br>
 
<br>
 
<br>
 
<li>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.<br>
 
<li>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.<br>
 
<br>
 
<br>
−
[[File:Animation M02 Check 002 05b.gif]]<br>
+
{{Video|name=Animation_M02_Check_002_05b.mp4|width=1279}}<br>
 
<br>
 
<br>
 
<li>Zoom to the landscape files and review the TIN triangles and elevations created by the points, line and region using the merge option. <br>
 
<li>Zoom to the landscape files and review the TIN triangles and elevations created by the points, line and region using the merge option. <br>
 
<br>
 
<br>
−
[[File:Animation M02 Check 002 06b.gif]]<br>
+
{{Video|name=Animation_M02_Check_002_06b.mp4|width=1279}}<br>
 
<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.tif'''
 
:*'''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 'Paletted/Unique Values'.
 
<li>Click 'Classify', five unique values appear referring to the material specified in the 2d_mat_M02_landscape and materials.csv file. Click 'OK'.
 
<li>Click 'Classify', five unique values appear referring to the material specified in the 2d_mat_M02_landscape and materials.csv file. Click 'OK'.
 
<li>The DEM_M shows the final material ID values. Change the labels to match the material class as shown below.<br>
 
<li>The DEM_M shows the final material ID values. Change the labels to match the material class as shown below.<br>
 
<br>
 
<br>
−
[[File:Animation_M02_Check_002_07b.gif]]<br>
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{{Video|name=Animation_M02_Check_002_07b.mp4|width=1279}}<br>
 
</ol>
 
</ol>
 
<br>
 
<br>

Latest revision as of 17:44, 24 November 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:

  1. Open the file, either:
    • Within the QGIS Browser Panel, navigate to Module_02\TUFLOW\check\M02_5m_002_Check.gpkg and double click the following layer, or
    • M02_5m_002_sh_obj_check_R
    • In File Explorer, navigate to the Module_02\TUFLOW\check folder, drag and drop the M02_5m_002_Check.gpkg into the QGIS workspace and select the layer above.
  2. Navigate to the Module_02\TUFLOW\check folder and open the following layers into QGIS:
    • M02_5m_001_DEM_Z.tif
    • M02_5m_002_DEM_Z.tif
  3. Use the 'Apply TUFLOW Styles to Open Layers'.
  4. Use the 'Apply GPKG Layer Names'.
  5. The DEM_Z grid shows the final elevations including any topographic modifications used for the model calculations.
  6. 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.
  7. Use the Profile Tool plugin to compare the DEM_Z files from both model runs.



  8. The first no merge region raises all elevation points to a single value.



  9. The second no merge region adds a specified value to all elevation points.



  10. The merge region used for the farm dam rehabilitation interpolates between all perimeter elevation points.



  11. 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.



  12. Zoom to the landscape files and review the TIN triangles and elevations created by the points, line and region using the merge option.



  13. Open the following file from the Module_02\TUFLOW\check folder:
    • M02_5m_002_DEM_M.tif
  14. Right click on the DEM_M file and select 'Properties'.
  15. From 'Render Type', select 'Paletted/Unique Values'.
  16. Click 'Classify', five unique values appear referring to the material specified in the 2d_mat_M02_landscape and materials.csv file. Click 'OK'.
  17. 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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