メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.854740672105 43.3312909835303, 141.854720810025 43.3313196087297, 141.85472379068 43.3313651211618, 141.854929569181 43.3320312018705, 141.853874192074 43.3321951475432, 141.853040010077 43.332323843001, 141.852647193788 43.3323844395443, 141.852437841384 43.3316520259058, 141.852309443769 43.3312027497702, 141.853003764006 43.3310926331337, 141.853543805994 43.3310044833408, 141.853602678465 43.3309952628635, 141.854578462781 43.3308434213886, 141.854670125869 43.3308283352761, 141.854799831356 43.3312744493489, 141.854740672105 43.3312909835303)) ^^http://www.opengis.net/ont/geosparql#wktLiteral