メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.450438813958 43.0466408334437, 141.449863275422 43.0467513110205, 141.449269654884 43.0468584948025, 141.449075644967 43.0462408987656, 141.448940638726 43.0458015109078, 141.448820144884 43.0454225690689, 141.448673160152 43.0450087692261, 141.448529709337 43.044507853032, 141.450228515079 43.0441938157976, 141.450522229709 43.0450460977855, 141.45101691682 43.0465468270855, 141.450438813958 43.0466408334437)) ^^http://www.opengis.net/ont/geosparql#wktLiteral