メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.559836158774 42.9714773695508, 141.560076382682 42.9715185532838, 141.559827740766 42.9720425039971, 141.559712728666 42.9722769300739, 141.559414653369 42.9727671737956, 141.559324026571 42.9729361977371, 141.557578734523 42.9723327636, 141.557830530738 42.9719394432281, 141.55795684062 42.9717401134054, 141.558304243248 42.971198758957, 141.558433596316 42.9710053544356, 141.558441679959 42.9709933057473, 141.559255050413 42.9712754613429, 141.559836158774 42.9714773695508)) ^^http://www.opengis.net/ont/geosparql#wktLiteral