[Proj] NADCON spec
Clifford J Mugnier
cjmce at lsu.edu
Wed Sep 9 09:44:39 EST 2009
Contact Mr. David Doyle, Chief Geodesist at the National Geodetic Survey for an official copy of the suite of Fortran source code at: Dave.Doyle at noaa.gov <mailto:Dave.Doyle at noaa.gov> Note that the documentation is a bit sketchy since it was developed for internal use of the NGS scientific staff, and not as a "user-friendly package" for the general public.
However, I am pretty confident that they have not developed a tranlator from NTV2 to NADCON since the latter is the senior technique developed by LTCDR Warren Dewhurst for his dissertation at Ohio State University in the early 1980s.
Clifford J. Mugnier, C.P., C.M.S.
Past National Director (2006-2008),
Photogrammetric Applications Division
American Society for Photogrammetry and Remote Sensing
Chief of Geodesy,
CENTER FOR GEOINFORMATICS
Department of Civil Engineering
Patrick F. Taylor Hall 3223A
LOUISIANA STATE UNIVERSITY
Baton Rouge, LA 70803
Voice and Facsimile: (225) 578-8536 [Academic]
Voice and Facsimile: (225) 578-8925 [Research]
Honorary Life Member of the
Louisiana Society of Professional Surveyors
Member Emeritus of the ASPRS
Member of the Americas Petroleum Survey Group
From: proj-bounces at lists.maptools.org on behalf of Richard didier
Sent: Wed 09-Sep-09 04:04
To: proj at lists.maptools.org
Subject: [Proj] NADCON spec
I need to produce NADCON grid from our NTV2 grid.
I have searched the web for NADCON grids specs and only found that a NADCON
grid is a bundle including the data AND the software that reads them ... I,
also, found that there are two files needed (one for longitudes, another one
for latitudes) and that longitudes/latitudes must be round even values ...
But, I am not sure of all of that.
On the other hand, PROJ.4 includes a reader for converting lla (ascii) to
binary ... and lla is mentioned in some web pages.
So, is there "real" specifications for NADCON Grids ? and could someone point
me to them ?
Didier RICHARD, chef du pôle technique Géoportail pour l'IGN
Institut Geographique National tel: +33/0 18.104.22.168.23
2/4 Avenue Pasteur fax: +33/0 22.214.171.124.88
F-94165 St-Mande Cedex e-mail: Didier.Richard at ign.fr
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