メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.369175551389 43.7677942931916, 142.369468466341 43.768327007077, 142.367956556844 43.7687636110314, 142.367661945752 43.7682367489254, 142.367356029764 43.7676897172603, 142.368227783498 43.7674349463191, 142.36887412256 43.7672460470798, 142.369175551389 43.7677942931916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral