メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.180596863757 34.7963163319527, 137.180009494877 34.7963051287324, 137.179818263126 34.7963276859721, 137.179545078696 34.7963953248062, 137.178411192075 34.7955841191258, 137.178670691437 34.7953699959132, 137.178984827538 34.7951671349232, 137.179353604264 34.7949868040482, 137.17946286033 34.7948741095064, 137.179872524368 34.794220503819, 137.179981721949 34.7938148326589, 137.180295929701 34.7940401642415, 137.180528156488 34.7941302845985, 137.18067842073 34.794175340698, 137.18092428996 34.7941753122178, 137.180637685511 34.7954599340893, 137.180610448918 34.7959219388132, 137.180596863757 34.7963163319527)) ^^http://www.opengis.net/ont/geosparql#wktLiteral