メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.987074882321 34.6802420762256, 137.986555850298 34.6803969516366, 137.986312478953 34.6797908016823, 137.986238337539 34.6796062473547, 137.986368721891 34.6795677784671, 137.986635659144 34.679534108967, 137.98676429988 34.6795294382656, 137.986918153308 34.6795352964306, 137.987064584228 34.6795559130909, 137.987116771575 34.6798372850366, 137.986927099411 34.6798881832732, 137.987074882321 34.6802420762256)) ^^http://www.opengis.net/ont/geosparql#wktLiteral