メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.870143793117 38.7819355639695, 139.868482773795 38.7818299484531, 139.86786081496 38.7817911707657, 139.867801010862 38.7804298310976, 139.867785625359 38.7802236346504, 139.867805968484 38.7800149182494, 139.867724550287 38.7797247070316, 139.868053153881 38.7796932175888, 139.868319475079 38.7797398966871, 139.868490107572 38.779748202593, 139.869711966402 38.7798455545544, 139.870356892374 38.7798869049471, 139.870232020364 38.7810437478478, 139.870143793117 38.7819355639695)) ^^http://www.opengis.net/ont/geosparql#wktLiteral