Difference between revisions of "FM Tutorial M01 QGIS GPKG x1D Nodes"

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<br>{{Video|name= Define External 1D Networks GPKG v3.mp4 |width=1123}}<br>
 
<br>{{Video|name= Define External 1D Networks GPKG v3.mp4 |width=1123}}<br>
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<br>In recent versions of Flood Modeller, it is possible to export the nodes to a TUFLOW Shapefile using the Export->Nodes as TUFLOW Shapefile tool.  This can then be imported into the Geopackage file format as the 1d_X1D layer.  It should however be noted that the model should be correctly georeferenced within Flood Modeller which isn't always the case. The georeferencing of a model network can be a time-consuming process and should be considered at the project outset.<br>
 
<br>In recent versions of Flood Modeller, it is possible to export the nodes to a TUFLOW Shapefile using the Export->Nodes as TUFLOW Shapefile tool.  This can then be imported into the Geopackage file format as the 1d_X1D layer.  It should however be noted that the model should be correctly georeferenced within Flood Modeller which isn't always the case. The georeferencing of a model network can be a time-consuming process and should be considered at the project outset.<br>

Revision as of 03:03, 30 September 2025

    Introduction

    We will now create a TUFLOW GIS layer to reference the external 1D nodes within the Flood Modeller model network. The purpose of this layer is to specify the spatial location of each of the linked Flood Modeller nodes. This allows TUFLOW to read the water levels from the Flood Modeller model and apply them to the TUFLOW domains as 2D water level boundaries.

    Method

  1. Open the FloodModeller_Nodes_P.shp layer from the Module_Data\Module_01\gis folder.
  2. Open the project GeoPackage file M02_5m_002.gpkg in the Browser Panel. Drag and drop the layer FloodModeller_Nodes_P.shp into the project GeoPackage file M02_5m_002.gpkg. Re-name the layer b>1d_x1d_FMT_M01_nodes_001_P.gpkg.
  3. Open the attribute table. This layer only has a single attribute correlating to the unique Node ID of a RIVER, INTERPOLATE or REPLICATE unit within the Flood Modeller model. Note that the Node IDs are case-sensitive as this is a requirement of Flood Modeller. At junctions, both the upstream and downstream nodes must be digitised within this layer. It is often helpful to label the Node IDs.



    4. In recent versions of Flood Modeller, it is possible to export the nodes to a TUFLOW Shapefile using the Export->Nodes as TUFLOW Shapefile tool. This can then be imported into the Geopackage file format as the 1d_X1D layer. It should however be noted that the model should be correctly georeferenced within Flood Modeller which isn't always the case. The georeferencing of a model network can be a time-consuming process and should be considered at the project outset.


    You have now created the GIS layer representing the Flood Modeller nodes for reading into TUFLOW. Return to the Flood Modeller Tutorial Model.

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