Grid Shift Files
=================== 
Datum conversions are possible using grid shift files.  
For Canadian transformations, use the NTv2 grid shift file.  
For transformations on the continental US, use the NADCON grid 
shift files.


1)	Download the grid shift file (NTV2_0.zip) to the program 
	parameters folder:
	
	Terrain Tools version 4.x
		"C:/Program Files/Softree/Terrain"

	Terrain Tools version 5.x
		XP		"C:\Documents and Settings\All Users\Application Data\Softree\Terrain"
		Vista	"C:\ProgramData\Softree\Terrain"
		
		If the above folder does not exist then you must have installed over an
		existing version 4.x install. In this case the parameters folder will
		be the same as for version 4.x: "C:/Program Files/Softree/Terrain"

	RoadEng version 4.x
		"C:/Program Files/Softree/RoadEng"

	RoadEng version 5.x
		XP		"C:\Documents and Settings\All Users\Application Data\Softree\RoadEng"
		Vista	"C:\ProgramData\Softree\RoadEng"
		
		If the above folder does not exist then you must have installed over an
		existing version 4.x install. In this case the parameters folder will
		be the same as for version 4.x: "C:/Program Files/Softree/RoadEng"


2) Unzip the file.