L - GIS location (latitude, longitude, precision)
Code of field: L (for Location)
Type of field: Latitude, longitude data, altitude in meters and precision factor (PF) in kilometers.
Applicable to:
Latitude and longitude values can be entered in degree/minute/second or in radian.
Comments:
L fields can only contain a single coordinate (latitude, longitude, altitude and precision). If one wants to link several coordinates to a given record, LLink fields should be chosen.