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Tutorial M01 Define Active Area QGIS: Difference between revisions

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Created page with "= Introduction = QGIS is used to set an active model area.<br> <br> = Method = Use the TUFLOW plugin to create the code polygon layer: <ol> <li>Click on the ‘Import Empty Fi..."
 
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<ol>
<li>Load in the '''Model_Boundary.shp''' from the '''Module_01\Tutorial_Data''' folder. Either drag and drop the .shp into QGIS or navigate to the file through Layer > Add Layer > Add Vector Layer.
<li>The region object in the '''Model_Boundary.shp''' is not in the TUFLOW file format and needs to be copied into the '''2d_code_M01_001_R.shp''' layer to have the correct attributes.
<li>Make the '''2d_code_M01_001_R.shp''' layer editable by right clicking the layer and selecting 'Toggle Editing'.
<li>Select the '''Model_Boundary.shp''' file by left clicking on it once in the Layers panel and use the 'Select Features' tool to highlight it. <br>
<li>Select 'Edit' from the top QGIS tab and 'Copy Features' from the drop down menu.
<li>Select the '''2d_code_M01_001_R.shp''' 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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[[File:Animation M01 Code 02b.gif]]<br>
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Define the area as active:
<ol>
<li>At present the '''2d_code_M01_001_R.shp''' is not active. Using the 'Identify Features' tool click on the '''2d_code_M01_001_R.shp''' region in QGIS. The attribute 'Code' has a value of 'NULL'.
<li>Right click on the 'NULL' value and select 'Edit Feature From', change the value to '1' and click 'OK'. <br>
<li>Toggle the editing off to save the edits.<br>
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Use the TUFLOW plugin for styling the code polygon layer to make it easier to work with:
<ol>
<li>Change the symbology of the '''2d_code_M01_001_R.shp''' layer to make it easier to work with.
<li>Left click the '''2d_code_M01_001_R.shp''' in the Layers panel to select it.
<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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