メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355764612443 43.7894710101555, 142.355208377136 43.7898868333971, 142.354639420462 43.7902968998887, 142.353842908191 43.7897191411716, 142.352987919244 43.7891164837859, 142.35306274967 43.78906648764, 142.353596190149 43.7886840978967, 142.353951549121 43.7884296804165, 142.3540232777 43.7883759760668, 142.3541445548 43.7882851490257, 142.355764612443 43.7894710101555)) ^^http://www.opengis.net/ont/geosparql#wktLiteral