メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.345767044565 43.0237026284559, 141.34576617255 43.023709795506, 141.345712671828 43.024141764474, 141.344940324186 43.0240923325875, 141.344996278323 43.0236568668384, 141.345028426994 43.0234063220003, 141.344445469059 43.0233653469841, 141.344502338578 43.0228025191744, 141.3445160276 43.0228037528379, 141.344890408587 43.0228313320426, 141.345867172303 43.0228953218853, 141.345767044565 43.0237026284559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral