メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343270166965 43.0361581435042, 141.344177226036 43.036224263348, 141.344158569398 43.0363519764893, 141.344131323584 43.0366073402148, 141.344111968267 43.0367891306484, 141.34401459699 43.0374838540397, 141.343306570288 43.0374300703159, 141.343117718173 43.0374152809847, 141.342597128278 43.0373878046884, 141.3426908462 43.0367078228653, 141.342708776316 43.0365125171573, 141.34276150589 43.0361221114735, 141.343270166965 43.0361581435042)) ^^http://www.opengis.net/ont/geosparql#wktLiteral