メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.883350280979 43.344098420668, 141.883696041418 43.3452724809741, 141.880372942341 43.3458369791089, 141.880005084132 43.3446669983364, 141.879997701181 43.3446450319359, 141.879643949637 43.3435107545045, 141.883031626951 43.3429885939381, 141.883350280979 43.344098420668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral