[OSRS-PROJ] NAD2NAD in the Dominican Republic

Cliff Mugnier cjmce at lsu.edu
Fri Apr 12 18:55:21 EDT 2002

Data files for NADCON-derived software are for
United States ONLY.  There likely will not be any
extension of the files for other countries.  I do
not believe that the U.S. National Geodetic Survey
has performed any Datum readjustments of ANY
countries in Latin America.  (Except for Mexico).

If you go to the Dominican Republic and spend a
couple years or more performing geodetic-quality
observations with dual-frequency GPS receivers for
the entire island of Hispaniola, you may have
sufficient information to start your own Datum
readjustment.  The results could then be used to
develop the distortion data files used to produce
a lattice of points solved for "minimum curvature"
constraints, etc.

In other words, don't hold your breath.  It ain't
gonna happen for decades.

Use a plain ole 3-parameter "Military Molodensky"
Datum shift and be satisfied.  You're not going to
do better than 25 meters per component, anyway.

Prof. Clifford J. Mugnier (cjmce at LSU.edu)
Chief of Geodesy
Department of Civil Engineering
2408 CEBA Building
Baton Rouge, LA  70803
Voice and Facsimile:  (225) 578-8536
Pager:                     1-(888) 365-5180
See:  http://www.ASPRS.org/resources.html
----- Original Message -----
From: "Alan Forster" <Alan.Forster at mouchel.com>
To: <osrs-proj at remotesensing.org>
Sent: Friday, April 12, 2002 10:05 AM
Subject: [OSRS-PROJ] NAD2NAD in the Dominican

>  From:Clifford J Mugnier/cjmce/LSU at mouchel.com
on 04/12/2002 04:05 PM CET
>  Hello,
>  I am trying to use NAD2NAD to convert between
NAD27 and
>  NAD83 co-ordinates.
>  The version of NAD2NAD I have downloaded
contains region
>  files that cover Puerto Rico and the Virgin
>  however the limit is 68W.  Therefore if I use
the prvi
>  region files I get * for my results.
>  Could you tell me if there has been an
extension to the
>  region files to cover the Dominican Republic?
The area
>  I am interested in is between 68d15W to 68d30W
>  18d15N to 18d45N.
>  Is there a new region file for this area?
>  Thanks,
>  Alan.
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