メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.318764609169 42.2836971168759, 143.319244014814 42.2838428945746, 143.319466127986 42.2848221779805, 143.319482183843 42.2848809707644, 143.318629014006 42.284524424693, 143.318012059733 42.2842663987218, 143.318043260112 42.2842236267261, 143.318521706883 42.2835498394699, 143.318579718807 42.283468129103, 143.318662520405 42.2834967602762, 143.318724352146 42.2835458420629, 143.318764609169 42.2836971168759)) ^^http://www.opengis.net/ont/geosparql#wktLiteral