メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.354597517789 43.7903229926596, 142.354058850635 43.7907185412585, 142.353882279988 43.7908424350904, 142.352995532437 43.7909452624553, 142.352851520238 43.790843372644, 142.3529191107 43.7907944022251, 142.352607478525 43.7905782317961, 142.352680623445 43.7905221896086, 142.352477661245 43.7903742212529, 142.352506028138 43.790350689783, 142.351901666009 43.7899189279318, 142.35242383656 43.7895435351215, 142.352987919244 43.7891164837859, 142.353842908191 43.7897191411716, 142.354639420462 43.7902968998887, 142.354597517789 43.7903229926596)) ^^http://www.opengis.net/ont/geosparql#wktLiteral