ows:PositionType2D

Two-dimensional position instances hold the longitude and latitude coordinates of a position in the 2D WGS 84 coordinate reference system. The longitude value shall be listed first, followed by the latitude value, both in decimal degrees. Latitude values shall range from -90 to +90 degrees, and longitude values shall normally range from -180 to +180 degrees. For the longitude axis, special conditions apply when the bounding box is continuous across the +/- 180 degrees meridian longitude value discontinuity:
a)  If the bounding box is continuous clear around the Earth, then longitude values of minus and plus infinity shall be used.
b)  If the bounding box is continuous across the value discontinuity but is not continuous clear around the Earth, then some non-normal value can be used if specified for a specific OWS use of the WGS84BoundingBoxType. For more information, see Subclauses 10.4.5 and C.13.