Difference between revisions of "Tutorial M04 Check Files QGIS GPKG"

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(Created page with "<span style="color:#FF0000"> <font size = 18>Page Under Construction</font> </span> = Introduction = QGIS is used to import the check files and review the topographic modifica...")
 
 
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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 topographic modification cutting through the embankment, and the layered flow constriction. <br>
 
QGIS is used to import the check files and review the topographic modification cutting through the embankment, and the layered flow constriction. <br>
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Review the check files:
 
Review the check files:
 
<ol>
 
<ol>
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<li>Open the following files from the '''Module_04\TUFLOW\check''' folder:
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<li>Open the files, either:
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*'''M04_5m_001_DEM_Z.tif'''
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:*Within the QGIS Browser Panel, navigate to '''Module_04\TUFLOW\check\M04_5m_001_Check.gpkg''' and double click the following layers, or
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*'''M04_5m_001_zsh_zpt_check_P.shp'''  
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::*'''M04_5m_001_zsh_zpt_check_P'''
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*'''M04_5m_001_lfcsh_uvpt_check_P.shp'''
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::*'''M04_5m_001_lfcsh_uvpt_check_P'''
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:*In File Explorer, navigate to the '''Module_04\TUFLOW\check''' folder, drag and drop the '''M04_5m_001_Check.gpkg''' into the QGIS workspace and select the layers above (hold Ctrl to select multiple).
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<li>Navigate to the '''Module_04\TUFLOW\check''' folder and open the '''M04_5m_001_DEM_Z.tif''' layer into QGIS.
 
<li>Use the 'Apply TUFLOW Styles to Open Layers'.
 
<li>Use the 'Apply TUFLOW Styles to Open Layers'.
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<li>The DEM_Z grid shows the final elevations used for the model calculations. Change the styling and inspect the area of the embankment is lowered. See <u>[[Tutorial_M02_001_Check_Files_QGIS | Module 2]]</u> for more information on how to review topographic modifications. Note: The DEM_Z appears different to the input DEM as the resolution of the DEM_Z is coarser (2.5m) than the input file (0.5m).<br>
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<li>Use the 'Apply GPKG Layer Names'.
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<li>The DEM_Z grid shows the final elevations used for the model calculations. Change the styling and inspect the area of the embankment is lowered. See <u>[[Tutorial_M02_001_Check_Files_QGIS_GPKG | Module 2]]</u> for more information on how to review topographic modifications. Note: The DEM_Z appears different to the input DEM as the resolution of the DEM_Z is coarser (2.5m) than the input file (0.5m).<br>
 
<li>The zsh_zpt_check file displays the elevation points changed by Z shape topographic update and the TUFLOW styling provides an indication of the elevation difference.<br>
 
<li>The zsh_zpt_check file displays the elevation points changed by Z shape topographic update and the TUFLOW styling provides an indication of the elevation difference.<br>
 
<br>
 
<br>
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[[File:Animation M04 Check 01c.gif]]<br>
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{{Video|name=Animation_M04_GPKG_Check_01.mp4|width=1280}}<br>
 
<br>
 
<br>
 
<li>The lfcsh_uvpt_check file shows the Zpts where the 2d_lfcsh is applied as a thin line. Only the cell sides have the flow constriction applied. The attribute table shows the values specified in the 2d_lfcsh and the final elevation of the invert level after applying the Z shape. <br>
 
<li>The lfcsh_uvpt_check file shows the Zpts where the 2d_lfcsh is applied as a thin line. Only the cell sides have the flow constriction applied. The attribute table shows the values specified in the 2d_lfcsh and the final elevation of the invert level after applying the Z shape. <br>
 
<br>
 
<br>
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[[File:Animation M04 Check 02e.gif]]
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{{Video|name=Animation_M04_GPKG_Check_02.mp4|width=1280}}
 
</ol>
 
</ol>
 
<br>
 
<br>

Latest revision as of 12:38, 14 August 2023

Introduction

QGIS is used to import the check files and review the topographic modification cutting through the embankment, and the layered flow constriction.

Method

This tutorial introduces:

Review the check files:

  1. Open the files, either:
    • Within the QGIS Browser Panel, navigate to Module_04\TUFLOW\check\M04_5m_001_Check.gpkg and double click the following layers, or
    • M04_5m_001_zsh_zpt_check_P
    • M04_5m_001_lfcsh_uvpt_check_P
    • In File Explorer, navigate to the Module_04\TUFLOW\check folder, drag and drop the M04_5m_001_Check.gpkg into the QGIS workspace and select the layers above (hold Ctrl to select multiple).
  2. Navigate to the Module_04\TUFLOW\check folder and open the M04_5m_001_DEM_Z.tif layer into QGIS.
  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 used for the model calculations. Change the styling and inspect the area of the embankment is lowered. See Module 2 for more information on how to review topographic modifications. Note: The DEM_Z appears different to the input DEM as the resolution of the DEM_Z is coarser (2.5m) than the input file (0.5m).
  6. The zsh_zpt_check file displays the elevation points changed by Z shape topographic update and the TUFLOW styling provides an indication of the elevation difference.



  7. The lfcsh_uvpt_check file shows the Zpts where the 2d_lfcsh is applied as a thin line. Only the cell sides have the flow constriction applied. The attribute table shows the values specified in the 2d_lfcsh and the final elevation of the invert level after applying the Z shape.


Conclusion

  • The DEM_Z and zsh_zpt_check file was used to ensure the cut through was correctly applied to allow flow through the embankment.
  • The lfcsh_uvpt_check was viewed showing the form losses and blockages applied to the thin line.


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