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FM Tutorial M01 QGIS SHP x1D Nodes: Difference between revisions

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== Introduction ==
Create a TUFLOW GIS layer to reference the external 1D nodes within the Flood Modeller model network. The layer specifies the spatial location of each linked Flood Modeller node, allowing TUFLOW to read water levels from the Flood Modeller model and apply them to the TUFLOW domains as 2D water level boundaries.
 
The layer specifies the spatial location of each linked Flood Modeller node, allowing TUFLOW to read water levels from the Flood Modeller model and apply them to the TUFLOW domains as 2D water level boundaries.
 
== Method ==
* Open the <b>FloodModeller_Nodes_P.shp</b> layer from the Module_Data\Module_01\gis folder.
* Save as <b>1d_x1d_FMT_M01_nodes_001_P.shp</b> within the FMT_tutorial\FMT_M01\TUFLOW\model\gis folder.<br>{{Video|name=Define_External_1D_Networks_SHP.mp4 |width=1123}}
 
*1. Open the GIS layer <b>1d_x1d_FMT_M01_nodes_001_PFloodModeller_Nodes.shp</b> withinlayer from the Module_Data\Module_01\gis QGISfolder.
 
* Open the attribute table. This layer only has a single attribute correlating to the unique name 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.▼
2. Save as <b>1d_x1d_FMT_M01_nodes_001.shp</b> within the FMT_M01\TUFLOW\model\gis folder.
In recent versions of Flood Modeller, it is possible to export the nodes to a TUFLOW Shapefile. This can then be used 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>
{{Video|name=Define_External_1D_Networks_SHP.mp4 |width=1123}}
<br>
 
3. Open the GIS layer <b>1d_x1d_FMT_M01_nodes_001_P.shp</b> within QGIS.
 
▲*4. Open the attribute table. This layer only has a single attribute correlating to the unique nameNode 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.
 
▲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 used 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.
 
 
{{Tips Navigation
You have now created the GIS layer representing the Flood Modeller nodes for reading into TUFLOW. Return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Define_the_1D/2D_Boundary Links|Flood Modeller Tutorial Model]].
|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Define the Water Level Lines| Back to Tutorial Module 01 Main Page]]
}}
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