メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.741835682971 43.2039723705585, 141.742273946426 43.2041959854436, 141.741548296419 43.2049708080335, 141.740946911339 43.2055813290438, 141.740490094592 43.2053452489885, 141.740012768415 43.20510211376, 141.740605070028 43.2044860012378, 141.74132601622 43.2037053268147, 141.741796724354 43.2039519434691, 141.741835682971 43.2039723705585)) ^^http://www.opengis.net/ont/geosparql#wktLiteral