メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.387867080496 43.0442148695496, 141.388723288049 43.0451524855533, 141.38849069252 43.0452051707824, 141.388016170406 43.0453125112811, 141.387234092121 43.0454979195651, 141.386643026781 43.0449644397677, 141.386157918523 43.0445272659623, 141.386760307109 43.0441698894502, 141.387440733579 43.0437445236557, 141.387867080496 43.0442148695496)) ^^http://www.opengis.net/ont/geosparql#wktLiteral