メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.346805239809 43.0879413289847, 141.34672641647 43.088277158966, 141.346628732276 43.0886101672588, 141.34662295497 43.0886298595755, 141.346517104371 43.0889906791286, 141.346119639319 43.0889281856128, 141.345972653142 43.0889050742764, 141.345798484441 43.0888792928483, 141.344943294127 43.0887630221477, 141.345131134061 43.0880557374038, 141.345220688725 43.0877084594637, 141.345305250986 43.0873417316477, 141.346010764044 43.0874362796263, 141.346900629192 43.0875554855325, 141.346805239809 43.0879413289847)) ^^http://www.opengis.net/ont/geosparql#wktLiteral