メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.119956056785 43.5418278297152, 142.118246081708 43.5416805050223, 142.116933975173 43.5415575220974, 142.115297386747 43.541422544206, 142.11308823905 43.5412498404504, 142.113194731659 43.5405471446641, 142.11319984043 43.540516418609, 142.113790855955 43.5406699304455, 142.114800495532 43.5408012130632, 142.114905798864 43.5408094588727, 142.116088979779 43.5409021832897, 142.11638615066 43.5409159232681, 142.118942257265 43.5410451083737, 142.120046198155 43.5411069705288, 142.119956056785 43.5418278297152)) ^^http://www.opengis.net/ont/geosparql#wktLiteral