CEA Module on GAIR¶

From Case studies select the Module CEA menu item to explore the list of available case studies for that module.

Fig. 31 CEA case studies list.¶

Each list item for CEA related case studies present a small overview of the domain area, the case study type (default or customized), resolution of the grid, Case study title and description.

Fig. 32 CEA case study list item.¶

To open a case study click on the title or “open” button. The detail page presents all layers and layer expressions already configured for the case study

Fig. 33 CEA case study detail page¶

In the case study detail page (Fig. 25) are presented the following elements:

a map section with the domain area boundaries;
name and description of the case study;
the list of input layers as described in Module inputs;

4) the SET MATRIX INPUTS button to change values of weights and sensitivity matrix as described in :Module inputs;

the run case study button to run the CEA module within this case study;

6) the clone case study button (6) to create a customized case study starting from this configuration;

You can either set configuration data in the default case study (input layers and input matrix) or clone the current case study to create a customized one

To check the content of a layer you can click on the layer thumbnail to open a new window with a larger preview image and a Download layer control.

Fig. 34 CEA case study layer preview¶

Configure default run¶

Select input layers from list. You’ll see the list of input layers displayed as a grid with layer name, thumbnail and selection control. The input layers thumbnails are is loaded directly from the API server and in case the thumbnails are not showed as usual could be due to a connection trouble with the external server.

Please check the layers list and identify what kind of input each layers refers to.

Table 6 Example of CEA input layers¶
Layer	Input type
Domain area boundary	Embedded in case study def
Grid of analysis	Resolution (required)
Mammals	environmental component
Fishing ports	human use

You can quickly select all layers using select all layers checkbox, this will compute CEA considering all enviromental components and all human uses available- If you need to investigate the cumulative effects on a subset of components or human uses you can manually select (or deselect) the layers to consider.

Review or change input values for weights/sensitivities matrix. Click on SET MATRIX INPUTS to open the matrix input widget for weights and sensitivities

Fig. 35 CEA weights matrix input widget¶

Fig. 36 CEA sensitivities matrix input widget¶
Click on Run Case Study to run teh module for the current case study. When the Run is complete the results will be listed in the same page on a new tab.

Fig. 37 CEA results list: json results (1) and raster outpus (2)¶

To download the json output right click on Download Run button and select Save destination To download raster outputs jus click on Download Layer To make another Run click again on the Layer tab (3).

Clone case study to a customized one¶

select Clone case Study: the new case study will open in the same page but you’ll see Type: customized in the summary box over 6 (Fig. 25)
write down the Case Study ID number in the las part of the new URL (e.g. https://www.portodimare.eu/casestudies/XXX/)
create new layer expression and add it to case study as described in How to create a new expression section and link to the new created case study (you can identify the correct one with title and ID see Create expression interface number 2).
to add new layers already stored in the geoportal you need to create a simple layer expression with just one layer without operators.
get back to the customized case study using View case study Button (Fig. 47)
click Run Expression (Fig. 45) for each customized layer then select the coded label from dropdown list to assign the result to a CEA input

Fig. 38 CEA coded label selection¶
Select layers and set matrix inputs as described in Configure default run section