メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.363408068037 43.7757846956629, 142.363779614413 43.7758940682503, 142.364137844364 43.7760105204843, 142.363878534715 43.7764546593825, 142.363760574229 43.7766586703012, 142.363700119054 43.7767632086859, 142.363651792418 43.7768467797328, 142.362901237403 43.776600877307, 142.362174554693 43.77637530605, 142.362403787616 43.7759995534985, 142.362680337836 43.7755660376031, 142.362688478062 43.7755523354613, 142.363408068037 43.7757846956629)) ^^http://www.opengis.net/ont/geosparql#wktLiteral