Reference: HELM
Status:
STD 2005/06/07
Reference text:
US National Geospatial-Intelligence Agency
(NGA).
Helmert Transformations
[online]. Washington, D.C.: NGA, updated 14 April 2008 [cited 17 November 2010]. Available from World Wide Web: <
http://earth-info.nga.mil/GandG/coordsys/datums/helmert.html
>.
Normative:
No
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