View Results in QGIS with Crayfish: Difference between revisions
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=Introduction=
A plugin for QGIS has been developed (by Lutra Consulting) which allows the TUFLOW binary format (.dat) results to be viewed in QGIS without the need to convert these into shapefile or raster format.
The plugin has a number of
To view models with 1D WLL mapping (which is introduced in Module 04) raster and vector layers will need to be used, this method is outlined in the following page <u>[[View_Results_in_QGIS | view Results in QGIS using shapefiles / raster layers]]</u>.
=Method=
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<li>A "Crayfish Viewer" dock should have been created when you opened the first results file. This contains option for choosing which parameter (depth, level, flow or velocity) to display and also the model output time. Select "Dep M01_5m_002" from the Quantity list and then scroll through the output times. The results should update as new output times are selected. The window should look similar the below:</li>
[[File:QGIS Crayfish 03.jpg|800px]]
<li>Both the depth and water level (head) are scalar results. Switch across to the "Vel M01_5m_002" dataset, this is a vector output and has both direction and magnitude. The "Display Contour" and "Display Vectors" options should now be selectable. Scrolling through the output times should display both shading (velocity magnitude) and arrows (direction).<br>
[[File:QGIS Crayfish 04.jpg|800px]]
<li>The appearance of the contour and vectors can be changed. Open the '''Vector Options''' and change the "Shaft Length" option to '''Scale to Magnitude'''. Select apply to update the display. The arrow length is now proportional to the speed of the water.<br>
[[File:QGIS Crayfish 05.jpg|500px]]
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<li>Please feel free to experiment with the visualisation options and get a feel for your TUFLOW results. Do
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=Conclusion=
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