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Tutorial M01 Define Active Area QGIS GPKG: Difference between revisions

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= Introduction =
QGIS is used to set an active model area.<br>
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<li>A layer called '''2d_code_M01_001_R''' in a region format with the relevant TUFLOW attributes is created. The TUFLOW plugin automatically creates a GeoPackage database called '''M01_001.gpkg''' in the '''Module_01\TUFLOW\model\gis''' folder, saves the '''2d_code_M01_001_R''' layer within it and opens it in the QGIS Layers panel.<br>
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{{Video|name=Animation_M01_GPKG_Code_01a_.mp4|width=1274}}
[[File:Animation_M01_GPKG_Code_01.gif]]<br>
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The model extent is provided in a common GPKG layer:
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<li>Load in the '''Model_Boundary.gpkg''' from the '''Module_01\Tutorial_Data''' folder,. Drag and drop the '''Model_Boundary.gpkg''' into QGIS. either:
:*Drag and drop the '''Model_Boundary.gpkg''' into the QGIS workspace, or
:*Navigate to the file through the Browser Panel and double click.
<li>The region object in the '''Model_Boundary''' is not in the TUFLOW file format and needs to be copied into the '''2d_code_M01_001_R''' layer to have the correct attributes.
<li>Make the '''2d_code_M01_001_R''' layer editable by right clicking the layer and selecting 'Toggle Editing'.
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<li>Select the '''2d_code_M01_001_R''' layer in the Layers panel by left clicking on it once. Select 'Edit' from the top QGIS tab and click 'Paste Features' from the drop down menu.<br>
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{{Video|name=Animation_M01_GPKG_Code_02_.mp4|width=1274}}<br>
[[File:Animation_M01_GPKG_Code_02.gif]]<br>
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<li>At present the '''2d_code_M01_001_R''' is not active. Using the 'Identify Features' tool click on the '''2d_code_M01_001_R''' region in QGIS. The attribute 'Code' has a value of 'NULL'.
<li>Right click on the 'NULL' value and change the value to '1'. Click 'OK'. <br>
<li>The feature ID 'fid' attribute is unique to GeoPackages. Leave this as 'Autogenerate' and QGIS will automatically assign a value.
<li>Toggle the editing off to save the edits.<br>
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[[File:{{Video|name=Animation_M01_GPKG_Code_03a.gif]]<br>mp4|width=1274}}
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<li>Select ‘Apply TUFLOW Styles to Current Layer’.
<li>This updates the styling of the layer to display points on the region vertices and set the opacity to 25%.<br>
 
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{{Video|name=Animation_M01_Code_04c_.mp4|width=1274}}
[[File:Animation_M01_Code_04c.gif]]<br>
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