メタデータ名 unitMeasure
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.6687500 43.9583333, 141.6750000 43.9583333, 141.6750000 43.9625000, 141.6687500 43.9625000, 141.6687500 43.9583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral