メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.754889363731 43.1843206915093, 141.755363548037 43.1845776127023, 141.755809465247 43.1848188676568, 141.75637650518 43.185110505523, 141.756150062187 43.1853450579277, 141.755770067442 43.1857368346601, 141.755494442274 43.1860093617971, 141.755073112443 43.1857753871518, 141.754499732691 43.1854711971584, 141.754074943092 43.1852561211142, 141.753671407168 43.1850514735005, 141.753908141997 43.1847872211671, 141.753886898836 43.1847758765044, 141.754485784532 43.1841160473038, 141.754889363731 43.1843206915093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral