QGIS Create a TIN: Difference between revisions
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=Introduction=
TUFLOW offers powerful tools for modifying a model's geometry, including generating Triangulated Irregular Networks (TINs) from input data. Alternatively, as outlined on this page, users can create TINs in QGIS before importing them into TUFLOW. The advantage of this approach is that it allows the user to visualise and review the TINs before they are included in the model.
To demonstrate the workflow, the DEM and GIS files from <u>[[Tutorial_M02#Part_2_-_Other_Topographic_Updates|Tutorial Module 2 (part 2)]]</u> are used as examples. The tutorial dataset can be downloaded from the <u>[[Tutorial_Introduction|Tutorial Model Introduction]]</u>. The instructions below refer to the GeoPackage format, but Shapefile format is also supported.
To create a TIN in QGIS, the following files are needed:
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=Method=
==Densify Polygon Vertices==
Densify the polygon vertices using the QGIS processing tool 'Densify by Interval'. For more information about this tool, please refer to the <u>[https://docs.qgis.org/3.
<ol>
<li>In QGIS, open the polygon layer (e.g. '''TUFLOW\model\gis\2d_zsh_M02_landscape_002_R''').<br>
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