Changes between Version 6 and Version 7 of VerticalDatums

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Timestamp:
05/10/11 10:17:27 (2 years ago)
Author:
warmerdam
Comment:

add note on vertical units.

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  • VerticalDatums

    v6 v7  
    3333I have added a new PROJ.4 option call +geoidgrids= similar to +nadgrids= to specify a list of vertical datum grid shift files that can be used to transform from the coordinate systems vertical grid to our pivot vertical datum (WGS84 Ellipsoidal).  The vertical datum grids must be in .gtx format.   
    3434 
     35Also note that from version 4.8.0 on there is support for +vunits / +vto_meter parameters to control the vertical units.  
     36 
    3537== Vertical Datum Shift Grid Collection == 
    3638