メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.874361785861 36.6717101015047, 136.87273255095 36.6710836621566, 136.872294373802 36.6708660907959, 136.872769318682 36.6702846524702, 136.872992538706 36.6700148429406, 136.873276796659 36.6698517748621, 136.873617804877 36.6696812424858, 136.874014198991 36.6698649824028, 136.874146912185 36.6697739202481, 136.874213254322 36.6697321911909, 136.874576122909 36.6700339179742, 136.874788069302 36.6702438904207, 136.874588639503 36.6704756719082, 136.874903691245 36.6709258371138, 136.874361785861 36.6717101015047)) ^^http://www.opengis.net/ont/geosparql#wktLiteral