I have to add 2 Vertical Coordinates systems to add to FME
These are:
WKID 6647 (CGVD 2013) Orthometric
WKID 5713 (CGND 1928) Normal-orthometric*
I have all the required grid files in .byn format and installed, that I understand to be able to work with the CSReprojector.
I'm trying to use the online Define Custom Coordinate System from FME to create a custom coordinate system for 6647 and 5713. I have the ESRI WKT info needed however I cannot submit because I need to reference a Datum.
However the datum is vertical and is:
Canadian_Geodetic_Vertical_Datum_of_2013
and
Canadian_Geodetic_Vertical_Datum_of_1928
And does not appear in the list of Datum's.
How do I do this, do I even need to or are the .byn files enough when working with the CSMapReprojector?
A second further problem is the CSMapReprojector asks for "Vertial handling" as seen here. With items like "Geocentric or ellipsoid height -> Orthometric height".
However I have: Normal-orthometric* -> Orthometric
*Normal Orthometric height (Hno): This terminology is not proper, but it is used to define the type of heights associated with CGVD28. These heights are neither orthometric nor normal, i.e., they are not compatible with the geoid or quasi-geoid. They are determined using normal gravity, but they are based on the formulation of orthometric heights. Normal orthometric heights were used in Canada because no actual gravity measurements were available at the time of the realization of CGVD28. The objective of the 1928 adjustment was the determination of the most accurate orthometric heights, which explains why they are commonly referred as orthometric heights. (Unit: m) -NRCAN
