メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376495733828 43.7762582538619, 142.376511011213 43.7762538770165, 142.376906607292 43.7770038149921, 142.376164427512 43.7772125314829, 142.375310517562 43.7774565245765, 142.374910227422 43.7767216524188, 142.374243135856 43.7755009314994, 142.375069629435 43.7752676817151, 142.375828641075 43.7750497767858, 142.376495733828 43.7762582538619)) ^^http://www.opengis.net/ont/geosparql#wktLiteral