Landmark received feedback from several customers regarding the 2003 datum shifting behavior. The behavior in R2003.X was technically incorrect. Datum shifts are designed to convert between coordinates in different datums, not between coordinates in the same datum. No conversion is required between two coordinates with the same datum.
An OpenWorks software geographic cartographic reference system (CRS) consists of both a datum and a datum shift to a standard reference datum, normally WGS 1984. Two different geographic CRS definitions can have the same datum and different datum shifts to WGS84. continue reading »
