= WFS Data downloader =

|| '''Date''' || 2012/09/17 ||
|| '''Contact(s)''' || François Prunayre ||
|| '''Last edited''' || ||
|| '''Status''' || Done ||
|| '''Assigned to release''' || 2.9.0 ||
|| '''Resources''' || Available (supported by Geonovum) ||
|| '''Ticket #''' || #1072 ||
|| '''Github source''' || https://github.com/fxprunayre/core-geonetwork/tree/feature/download-wfs ||


[[PageOutline(2-3,,inline)]]


== Proposal ==

The WFS data downloader component is a simple widget which helps user downloading data from a WFS service. A form is displayed in order to select:
 * a service (usually referenced in a metadata record)
 * a layer (aka. feature type) (which may be referenced in a metadata record)
 * an output format
 * a projection
 * an area of interest (a bounding box)

[[Image(geonetwork-wfs-download-form.png)]]


=== Widget configuration ===

The service and layer can be used to initialize the component.

If the service is not available, a warning is displayed.
If the layer is not published in the service, a warning is displayed.

A "download data" button is added to the view mode of the metadata when a WFS is registered in the current record.

[[Image(geonetwork-wfs-download.png)]]

The area of interest could be the linked map extent or a map control added to draw the extraction area.



=== How to link WFS service to a metadata record ? ===

The link to the WFS service is made from the distribution section adding an online resourcce element:
{{{
<gmd:onLine>
  <gmd:CI_OnlineResource>
    <gmd:linkage>
      <gmd:URL>http://wfs.service.url</gmd:URL>
    </gmd:linkage>
    <gmd:protocol>
      <gco:CharacterString>OGC:WFS</gco:CharacterString>
    </gmd:protocol>
    <gmd:name>
      <gco:CharacterString>featureType (optional)</gco:CharacterString>
    </gmd:name>
  </gmd:CI_OnlineResource>
</gmd:onLine>
}}}


If no name is provided, the WFS widget list all service feature types.

=== Proposal Type ===
 * '''Type''': Widget
 * '''App''': !GeoNetwork
 * '''Module''': Client app

=== Voting history ===

Vote proposed by Francois on 2012/10/10, result was
 * +1 Patrizia, Jeroen, Francois

== Risks ==
 * None.

== Participants ==
 * Francois Prunayre