メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.440845219551 43.8038274935863, 142.441889446198 43.8044721076093, 142.441521638059 43.8047861409849, 142.441030754224 43.8052092167518, 142.440813132545 43.8053976860366, 142.440694778024 43.8055022389375, 142.440124807631 43.8051571449152, 142.439627357208 43.8048559648786, 142.438571271908 43.804216520209, 142.438849548425 43.8039794505798, 142.439079151622 43.8037838625126, 142.439291262102 43.8036031752285, 142.439497915148 43.8034271203732, 142.439656451972 43.8032920543854, 142.439791518199 43.8031769975957, 142.440845219551 43.8038274935863)) ^^http://www.opengis.net/ont/geosparql#wktLiteral