メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.424904434919 43.8065620217075, 142.424970142027 43.8066017933791, 142.425447901174 43.8068909247102, 142.426099037635 43.807291281617, 142.426430474123 43.8074964770271, 142.425560927875 43.8082398091131, 142.425534897028 43.8082620714108, 142.425255752228 43.8084820540503, 142.424929637133 43.808274543869, 142.42433272122 43.8078625130514, 142.423826465497 43.8075297169021, 142.423256306092 43.8071692717615, 142.423463992137 43.8069391172367, 142.423510431036 43.8069597737312, 142.424367326564 43.8062300296911, 142.424904434919 43.8065620217075)) ^^http://www.opengis.net/ont/geosparql#wktLiteral