メタデータ名 observationStatus-N
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.3875000 35.7916667, 139.3937500 35.7916667, 139.3937500 35.7958334, 139.3875000 35.7958334, 139.3875000 35.7916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral