Clustering in FoodChain-Lab

Tasks

• Perform a clustering using the following workflow: https://github.com/SiLeBAT/BfROpenLa…
• Cluster all French primary producers based on their city.
• That means all stations from the same city should be put into one meta-station.

Step 1

• Import the Example Workflow from https://github.com/SiLeBAT/BfROpenLa….
• Open the Tracing View by double-clicking on it.

Step 2

• A window showing the delivery network opens.

Step 3

• Right click in the graph to open the context menu and select Set Selected Stations.

Step 4

• You should see this dialog now.
• Press the button in the red circle to change the Property value.

Step 5

• Select “Country”.

Step 6

• Now select “FR” as Value, since we want to cluster stations in France.
• Afterwards press Add to add another condition.

Step 7

• 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.

Step 8

• All French primary producers are selected now, which is indicated by the blue color.

Step 9

• Right click in the graph to open the context menu and select Collapse by Property to cluster the selected stations.

Step 10

• Select Yes to only cluster selected stations.

Step 11

• We want to cluster on city level. That means all stations from the same city will be merged.
• Select City and press OK.

Step 12

• Just press OK, since we do not want to exclude any cities.

Step 13

• All French primary producers have been clustered to cities.
• Each selected station (blue circle) is a French city.

Step 14

• 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 station (French city) is connected to all outbreak spots (red circles).

Step 15

• Since the graph looks confusing now, we should reapply the layout algorithm.
• Right click in the graph and select Apply Layout > Fruchterman-Reingold in the context menu.

Step 16

• The stations should be arranged in better way now.
• The layout algorithm is not deterministic, therefore your result will look different from the screenshot.
• To see which city is connected to all outbreak spots double click on the yellow circle.

Step 17

• As you can see in the dialog the city is “Perpignan”.
• Press Switch to GIS to see the city and its relations on a map.