メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.653848654197 43.9364251222451, 141.654033823036 43.9369181426525, 141.654269324381 43.9379841807564, 141.653840870051 43.9380460668779, 141.653401370187 43.9381079375488, 141.653255195613 43.9381285126304, 141.652260485463 43.9382671661588, 141.65213493677 43.9382830795434, 141.652010992933 43.9377604197529, 141.651879444736 43.9372056902664, 141.651750223952 43.9367051516989, 141.651621202353 43.9361608923455, 141.65206920855 43.936093605974, 141.652876583734 43.9359723582594, 141.65371404581 43.9358780139949, 141.653848654197 43.9364251222451)) ^^http://www.opengis.net/ont/geosparql#wktLiteral