FM Tutorial M02 QGIS GPKG Define Roughness: Difference between revisions

<li>CopyOpen the contents of the <b>FMT_tutorial\Module_data\Module_02\Materials</b> intofolder thein <b>TUFLOW\model\gis folder</b>QGIS. This folder contains the following two layers:

<li>OpenMove boththe layers within QGIS. The <b>2d_mat_FMT_M02_DEV_001_R.shp</b> layer contains polygons defining grassed areas and roads within the proposed development. The <b>2d_mat_FMT_M02_DEV_Buildings_001_R.shp </b> layer contains polygons defininginto the buildingsproject withinGeoPackage thefile proposed development<b>M02_5m_002.gpkg</b>.

<li>DragClose andthe drop bothtwo layers into the project GeoPackage file <b>M02_5m_002.gpkg</b> in the BrowserLayers Panel. Closeand boththen layersreload inthem from the Layersproject Panel.GeoPackage file '''M02_5m_002.gpkg'''.

<li> The <b>2d_mat_FMT_M02_DEV_001_R</b> layer contains polygons defining grassed areas and roads within the proposed development.i>The materials attribute for a number of polygons representing proposed roads in the <b>2d_mat_FMT_M02_DEV_001_R</b> layer have not been assigned and will need to be populated. Turn on Toggle Editing mode and assign a Material ID of 2 to these polygons as shown in the figure below. Leave the remaining larger polygon with a Material ID of 1.<br>

<li>The <b>2d_mat_FMT_M02_DEV_Buildings_001_R</b> layer contains polygons defining the buildings within the proposed development.All polygons within the <b>2d_mat_FMT_M02_DEV_Buildings_001_R</b> layer represent the buildings of the proposed development and will have the same Material ID of 3. Make use of the ‘Update All’ feature to automatically assign this value to all objects at the same time. Toggle Editing for the '''2d_mat_FMT_M02_DEV_Buildings_001_R''' layer then right-click and select ''Open Attribute Table''. Type '3' in the blank field and select ''Update All'' as shown in the figure below. <br>