XY Data with longitude values > +/-180 disappear when reprojected

Description

XY Data with longitude values outside the +/-180 range disappears when reprojected.

Most data in a geographic coordinate system has longitude values between -180 and +180 degrees. Occasionally, geographic data is stored with longitude ranges of -360 to zero or zero to 360.

Cause

This is a known issue. The code that handles XY data in ArcMap was not checking the LeftLongitude property. Longitude values that fall outside the +/-180 range were not being reprojected.

Geographic Coordinate systems are categorized into one of three types:

Longitute values ranging from -360 to 0
Longitude values ranging from -180 to +180
Longitude values ranging from 0 to +360

The type is included as the LeftLongitude property in the spatial reference.

Solution or Workaround