22
Copyright © 2014 Open Geospatial Consortium.
Figure 11 — NGA Agent levels
7.4 Conflated Map
This layer defines the precise inputs and outputs of the conflation session: 3 maps that are going to be conflated dataset level and a distance. As part of the definition of the
dataset, generic features and attributes feature and attribute types are also defined.
Three namespaces are defined; one for each dataset involved in the conflation process:
prefix usgs: http:www.opengis.netogcows10usgs_dataset . prefix osm: http:www.opengis.netogcows10osm_dataset .
prefix usgs_conf: http:www.opengis.netogcusgs_conf-dataset .
There are three feature collections Datasets involved on the conflation process.
usgs:USGSMap a ows:FeatureCollection; osm:OSMMap a ows:FeatureCollection;
usgs_conf:conflatedMap a ows:FeatureCollection .
Additionally, a distance is also defined values of it will be used as a threshold in the conflation step.
ows10:Distance rdfs:subClassOf ows:WPSParameter
.
NOTE: To be rigorous, the distance concept has to be defined in a different namespace e.g. in an OM namespace as it is not part of the WPS conflation profile definition.
At feature level, two feature types are involved on the conflation process subClassOf ows:feature-please remember that in this use case the output
features share the same feature type as the usgs map reference map-.
usgs:USGS_Feature rdfs:subClassOf ows:Feature . osm:USGS_Feature rdfs:subClassOf ows:Feature .
Copyright © 2014 Open Geospatial Consortium.
23 The attribute level is also represented by entities. Concretely, in this example, the
process conflates positions subClassOf ows:Line and addresses non- geographical property; both properties of the Features subClassOf
ows:Property.
usgs:USGS_Position rdfs:subClassOf ows:Line . osm:OSM_Position rdfs:subClassOf ows:Line .
usgs:USGS_Address rdfs:subClassOf ows:Property . osm:OSM_Address rdfs:subClassOf ows:Property .
The result of the conflation process is a conflated map which is a revision of the USGS map.
usgs_conf:conflatedMap prov:wasRevisionOf usgs:USGSMap .
Figure 12 — Dataset conflated map inputs diagram.
7.5 Conflated Step
In the conflation use case, the user is supervising the conflation steps that involve a set of a few features. For each step, we are documenting the features and the attributes
participating in it layer 5.
7.5.1 Defining the process step
Process step number 20140305 runs a conflation processes in this case we use the date as an identifier.
f2n:52N_ConflationExecution20140305 a f2n:52N_WPSConflationExecution .
The individual execution uses a plan that was executed by David as a client. The process execution started at 2014-03-03 08:10 and ended at 2014-03-03 10:20.
f2n:52N_ConflationExecution20140305 prov:used f2n:52N_ConflationAlgorithm_v1 .
f2n:52N_ConflationExecution20140305 prov:qualifiedUsage [ a prov:Usage ;