Le Mercredi 9 Septembre 2009 16:44, Clifford J Mugnier a écrit :
> Contact Mr. David Doyle, Chief Geodesist at the National Geodetic Survey
> for an official copy of the suite of Fortran source code at:
>
[hidden email] <mailto:
[hidden email]> 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.
>
Thanks a lot Clifford for the contact person information. I am forwarding this
hint to our geodesists.
> 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.
>
We will then develop the converter from our internal format (ascii) to NADCON.
> Bon chance,
>
Merci beaucoup,
Regards,
didier
> Clifford J. Mugnier, C.P., C.M.S.
> Past National Director (2006-2008),
> Photogrammetric Applications Division
> American Society for Photogrammetry and Remote Sensing
> and
> 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
> ======================================================
>
http://www.asprs.org/resources/GRIDS/> ======================================================
>
> ________________________________
>
> From:
[hidden email] on behalf of Richard didier
> Sent: Wed 09-Sep-09 04:04
> To:
[hidden email]
> Subject: [Proj] NADCON spec
>
>
>
> Hi all,
>
> 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 ?
>
> Sincerely,
> --
> Didier RICHARD, chef du pôle technique Géoportail pour l'IGN
> Institut Geographique National tel: +33/0 1.43.98.83.23
> 2/4 Avenue Pasteur fax: +33/0 1.43.98.80.88
> F-94165 St-Mande Cedex e-mail:
[hidden email]
>
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Didier RICHARD, chef du pôle technique Géoportail pour l'IGN
Institut Geographique National tel: +33/0 1.43.98.83.23
2/4 Avenue Pasteur fax: +33/0 1.43.98.80.88
F-94165 St-Mande Cedex e-mail:
[hidden email]
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