メタデータ名 age-over75
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.0625000 35.3875000, 137.0687500 35.3875000, 137.0687500 35.3916667, 137.0625000 35.3916667, 137.0625000 35.3875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral