OpenStreetMap (OSM) is a free collaborative mapping project that creates a free
editable vector map of the world. These crowdsourced data, meanwhile created by over
1.5 million users, is made available under the Open Database License and is published
in different formats. Since the map features have a wide variety of tags for agriculture,
these data are of major interest for use in LEO project.
In LEO, we published this data as RDF graphs.
For each feature contained in the source data, a unique URI is created and a spatial literal is attributed to it. The spatial literal corresponds to the closed polygon and defines the underlined area. For example, osm:waterplace_1 a osm:OSMFeature ; geo:hasGeometry "POLYGON ((24.12 34.80, ..., 24.12 34.80))"^^geo:wktliteral maps a protected area, which is a Lake, to a polygon in the Well Known Text Literal format provided by the GeoSPARQL ontology.
