メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.897907708143 43.3349426684474, 141.897915379143 43.3349696984419, 141.898289044373 43.3362025942869, 141.898329117587 43.3362459692565, 141.897008996155 43.3366001458637, 141.896990172958 43.3366059957732, 141.896188937615 43.3368545575679, 141.895602475106 43.3370519292305, 141.895236286893 43.3360823575555, 141.894839124157 43.3350238674764, 141.894832389803 43.3350058423504, 141.894790953175 43.334895508087, 141.896081735394 43.3346474865661, 141.89771595241 43.3343473760729, 141.897907708143 43.3349426684474)) ^^http://www.opengis.net/ont/geosparql#wktLiteral