メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.834425096776 38.9164689001387, 139.834770293726 38.9171521467383, 139.8351534199 38.9178872353157, 139.835511876295 38.9186024753822, 139.834562020734 38.918870019219, 139.833761255896 38.9191114587636, 139.833375414563 38.9184354645587, 139.833014406511 38.9176786034815, 139.832533321478 38.9168060622396, 139.832344742038 38.9164483236018, 139.833169395658 38.9162041405654, 139.834135303922 38.9158953565219, 139.834425096776 38.9164689001387)) ^^http://www.opengis.net/ont/geosparql#wktLiteral