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Tasks
- Perform a clustering using the following workflow: https://github.com/SiLeBAT/BfROpenLab…
- Cluster all French primary producers by using the GIS Cluster node.
- Use a Max Neighborhood Distance of 100km.
- That means two stations are put into the same cluster if their distance is less than 100km.
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- Drag the GIS Cluster node from FoodChain-Lab in the Node Repository to the Workflow Editor.
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- Connect the output of Joiner to the input of GIS Cluster.
- Connect the output of GIS Cluster to the first input of Tracing View.
- Double click on the GIS Cluster node to open its dialog.
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- In this dialog you can set up an algorithm for geographical clustering based on latitude and longitude.
- Click on Set Filter to define which stations should be clustered.
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- You should see this dialog now.
- Press the button in the red circle to change the Property value.
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- Now select “FR” as Value, since we want to cluster stations in France.
- Afterwards press Add to add another condition.
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- For the new condition select “type of business” as Property and “Primary Producer” as Value, since we want to cluster primary producers only.
- Now press OK.
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- Set the Max Neighborhood Distance to 100km. That means that stations with distance of less than 100km are put into the same cluster. For details on the algorithm look here: https://en.wikipedia.org/wiki/DBSCAN
- Press OK.
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- Right click on GIS Cluster to open its context menu and select Execute to execute the node.
- The results of the clustering are put into the new column ClusterID. This column will now be used in the Tracing View.
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- Open the Tracing View by double-clicking on it.
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- A window showing the delivery network should open now.
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- Right click in the graph to open the context menu and select Collapse by Property.
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- The clustering will be done based on the results of the GIS Cluster node.
- Select ClusterID and press OK.
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- Just press OK, since we do not want to exclude any area.
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- All French primary producers have been clustered to areas.
- Each selected station (blue circle) is an area in France.
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- Select “Picking” as Editing Mode and click in the graph to deselect all stations.
- You can now see, that one of the stations is yellow. That means, that this stations (French area) is connected to all outbreak spots (red circles).
- Press Switch to GIS to see where this area is.
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- The area is in Southern France.
