メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.378018639213 43.7852191895392, 142.377399133974 43.7854003015048, 142.376785158617 43.7855814202673, 142.373394501081 43.7865664621593, 142.373377745726 43.7865544020436, 142.372906767765 43.7861841953638, 142.372895539186 43.7861746964911, 142.372455247989 43.7858022761938, 142.376285079062 43.7846556821733, 142.376882448075 43.784474582431, 142.37749917998 43.7842994720196, 142.378018639213 43.7852191895392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral