メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352822997174 43.7960280084617, 142.352213234332 43.7964732899459, 142.350978222169 43.797377532941, 142.349862449931 43.7965687920609, 142.349698833105 43.7964458723504, 142.349561668438 43.7963428292297, 142.34960838336 43.796310123133, 142.350141537802 43.7959144661324, 142.350770186895 43.7954665420323, 142.350804853153 43.7954421091355, 142.351407962201 43.7950171819452, 142.352012277312 43.7945787131723, 142.352726824456 43.7950900686193, 142.353417302537 43.7955989458288, 142.352822997174 43.7960280084617)) ^^http://www.opengis.net/ont/geosparql#wktLiteral