メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.388381647957 43.8120221840045, 142.389209095189 43.8126373626828, 142.388675828202 43.8129978222773, 142.388208783384 43.8133491994021, 142.387698224789 43.8136931381855, 142.387313992687 43.8139789265325, 142.387231041054 43.8140363727408, 142.387087162106 43.8141456130649, 142.386733937055 43.8143928443417, 142.385928909401 43.8138146108147, 142.385096554241 43.813201627811, 142.385598768069 43.8128447000033, 142.386064010537 43.812512321657, 142.386542223618 43.8121591986349, 142.387037367032 43.8118069865516, 142.387555855792 43.811434017179, 142.388381647957 43.8120221840045)) ^^http://www.opengis.net/ont/geosparql#wktLiteral