Tutorial M01 Check Files QGIS GPKG: Difference between revisions

= Introduction =

QGIS is used to import check files and review the model domain, active cells, boundary conditions, materials and final elevations.<br>

<li>Use the 'Apply GPKG Layer Names' from the TUFLOW toolbar.<br>

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<li>The dom_check contains a rectangle of the 2D domain showing the location, orientation and size of the domain. Within this domain, cells can be turned on and off, outside of this domain no 2D calculations are performed. This domain is created using the <font color="blue"><tt>Origin</tt></font>, <font color="blue"><tt>Orientation</tt></font>, and <font color="blue"><tt>Grid Size (X,Y)</tt></font> commands in the TGC.

<li>The grd_check is the 2D grid defined by the 2d_code layer and contains a region object for each cell. It is useful to understand how the model is orientated, the cell size in relation to the hydraulic features and where certain calculations occur in the model. In this tutorial, the grid is orientated to align with the downstream road. <br>

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<li>The sac_check is related to the 2d_sa boundary layer and, by default, shows the lowest cell in every polygon where the hydrograph is applied to.<br>

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<li>The DEM_Z grid shows the final elevations used for the model calculations. The default size of the grid cells is half the smallest 2D cell size. In this tutorial it is 2.5m. </li>

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<li>Right click on the DEM_M file and select 'Properties'.

<li>The DEM_M shows the final material ID values. Change the labels to match the material class as shown below.<br>

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