Tuflow

Tutorial M02 002 GIS Inputs QGIS GPKG: Difference between revisions

Browse history interactively
← Older editNewer edit →
Content deleted Content added
VisualWikitext
Line 33:
:*Shape_Option = NO MERGE (assigns a single elevation to all Zpts falling within the polygon without interpolating the edges to the original topography) <br>
<br>
[[File:Animation M02 GIS 02Animation_M02_GPKG_GIS_002_02.gif]]<br>
<br>
<li>Zoom to the south west corner of the grid to digitise the second polygon.
Line 42:
<li>Turn off editing to save the edits.<br>
<br>
[[File:Animation M02 GIS 01Animation_M02_GPKG_GIS_002_01.gif]]<br>
<br>
</ol>
Line 60:
<li>Turn off editing to save the edits.<br>
<br>
[[File:Animation M02 GIS 03Animation_M02_GPKG_GIS_002_03.gif]]<br>
<br>
</ol>
Line 76:
:*Shape_Width = -1<br>
<br>
[[File:Animation M02 GIS 04Animation_M02_GPKG_GIS_002_04.gif]]<br>
<br>
<li>Add more vertices by holding Shift and double click along the upstream and downstream sides of the polygon. By default TUFLOW uses the merge option and the negative Shape_Width instructs TUFLOW to sample the DEM elevation only at the location of the polygon vertices. <br>
Line 94:
<li>The region layer sets the area over which the TIN functionality takes place. Without points snapped to the perimeter vertices of the region, the elevations are inserted from the underlying Zpt elevations, it uses the default merge option.<br>
<br>
[[File:Animation M02 GIS TIN 03Animation_M02_GPKG_GIS_002_TIN_01.gif]]<br>
</ol>
<br>
Retrieved from "https://wiki.tuflow.com/Tutorial_M02_002_GIS_Inputs_QGIS_GPKG"