Root property element of a geo-oasis GML instance Container for optional geo-oasis attributes Point property element containing a pair of coordinates representing latitude then longitude in the WGS84 coordinate reference system This geo-oasis Simple element maps completely onto the where + gml:Point combination of geo-oasis GML Line property element containing a list of pairs of coordinates representing latitude then longitude in the WGS84 coordinate reference system This geo-oasis Simple element maps completely onto the where + gml:LineString combination of geo-oasis GML Closed ring property element containing a list of pairs of coordinates (first pair and last pair identical) representing latitude then longitude in the WGS84 coordinate reference system This geo-oasis Simple element maps completely onto the where + gml:Polygon combination of geo-oasis GML Rectangular envelope property element containing two pairs of coordinates (lower left envelope corner, upper right envelope corner) representing latitude then longitude in the WGS84 coordinate reference system This geo-oasis Simple element maps completely onto the where + gml:Envelope combination of geo-oasis GML Extended doubleList with the addition of geo-oasis where attributes XML List based on XML Schema double type, identical to gml:doubleList. An element of this type contains a space-separated list of double values Optional additional parameters for a geo-oasis location property Optional where attribute indicating the type of geographic entity is being referred to. Default is "location" Optional where attribute indicating how geotagged content is related to the represented location. Default is "isLocatedAt" Optional where attribute indicating a GPS-measured elevation in meters (e.g. WGS84 geoid height) Optional where attribute indicating elevation by building floor Optional where attribute indicating size in meters of a radius or buffer being indicated around the geometry (e.g. radius of circular area around a point geometry