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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE rdf:RDF [
<!ENTITY rdf 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
<!ENTITY wgs84_pos 'http://www.w3.org/2003/01/geo/wgs84_pos#'>
<!ENTITY rdfs 'http://www.w3.org/2000/01/rdf-schema#'>
]>
<rdf:RDF xmlns:rdf="&rdf;"
xmlns:wgs84_pos="&wgs84_pos;"
xmlns:rdfs="&rdfs;">
<rdfs:Class rdf:about="&wgs84_pos;Point"
rdfs:label="Point">
<rdfs:comment>
Uniquely identified by lat/long/alt. i.e.
spaciallyIntersects(P1, P2) :- lat(P1, LAT), long(P1, LONG), alt(P1, ALT),
lat(P2, LAT), long(P2, LONG), alt(P2, ALT).
sameThing(P1, P2) :- type(P1, Point), type(P2, Point), spaciallyIntersects(P1, P2).
A point, typically described using a coordinate system relative to Earth, such as WGS84.
</rdfs:comment>
<rdfs:subClassOf rdf:resource="&wgs84_pos;SpatialThing"/>
</rdfs:Class>
<rdfs:Class rdf:about="&wgs84_pos;SpatialThing"
rdfs:label="SpatialThing">
<rdfs:comment>Anything with spatial extent, i.e. size, shape, or position. e.g. people, places, bowling balls, as well as abstract areas like cubes.
</rdfs:comment>
<rdfs:subClassOf rdf:resource="&rdfs;Resource"/>
</rdfs:Class>
<rdf:Property rdf:about="&wgs84_pos;alt"
rdfs:label="alt">
<rdfs:comment>The WGS84 altitude of a SpatialThing (decimal meters
above the local reference ellipsoid).</rdfs:comment>
<rdfs:domain rdf:resource="&wgs84_pos;SpatialThing"/>
</rdf:Property>
<rdf:Property rdf:about="&wgs84_pos;lat"
rdfs:comment="The WGS84 latitude of a SpatialThing (decimal degrees)."
rdfs:label="lat">
<rdfs:domain rdf:resource="&wgs84_pos;SpatialThing"/>
</rdf:Property>
<rdf:Property rdf:about="&wgs84_pos;lat_long"
rdfs:label="lat_long">
<rdfs:comment>A comma-separated representation of a latitude, longitude coordinate.</rdfs:comment>
</rdf:Property>
<rdf:Property rdf:about="&wgs84_pos;long"
rdfs:comment="The WGS84 longitude of a SpatialThing (decimal degrees)."
rdfs:label="long">
<rdfs:domain rdf:resource="&wgs84_pos;SpatialThing"/>
</rdf:Property>
</rdf:RDF>
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