Add WP08-EFEHR_exposure for SERA risk exposure

[daniviga]

As requested by @hcrowley I'm adding a ttl files with definitions and metadata related to EFEHR/SERA (https://eu-risk.eucentre.it/ and https://maps.eu-risk.eucentre.it/) to be injected in the ICS portal.

For any further information/request related to SERA please refer to Helen Crowley (@hcrowley).

[rpaciello]

@daniviga I fixed some issues in your file. We tried to test your WMS by using default parameters, but it returns a blank image: _https://maps.eu-risk.eucentre.it/mapproxy/EU_Exposure_L0/ows?service=WMS&version=1.3.0&request=GetMap&layers=european-exposure-country-data&crs=EPSG:4326&format=image/png&width=1536&height=811&bbox=32.5000,-32.5000,73.5000,32.5000&styles=_

[daniviga]

@rpaciello thank you! Much appreciated.

We tried to test your WMS by using default parameters, but it returns a blank image: _https://maps.eu-risk.eucentre.it/mapproxy/EU_Exposure_L0/ows?service=WMS&version=1.3.0&request=GetMap&layers=european-exposure-country-data&crs=EPSG:4326&format=image/png&width=1536&height=811&bbox=32.5000,-32.5000,73.5000,32.5000&styles=_

That layer actually contains only (the main) data for the GetFeatureInfo (i.e. the data that is returned when you click a polygon here https://maps.eu-risk.eucentre.it/map/european-exposure-level-1/) and it should be used in association with one of the other layers (like 'population'). There's any way in the ttl file to specify that the default parameter should be something composed by multiple layers?

Is it valid something like

            hydra:mapping[ a hydra:IriTemplateMapping;
                hydra:variable "layers"^^xsd:string;
                rdfs:range "xsd:string";
                rdfs:label "Layers";
                http:paramValue "european-exposure-level-1";
                http:paramValue "number-of-buildings";
                http:paramValue "population";
                http:paramValue "total-replacement-cost-m-eur";
                schema:defaultValue "population,european-exposure-level-1";
                hydra:required "true"^^xsd:boolean;
            ];

having two layers as the default parameter?

The result is: