Hi
I agree but there is another problem with military maps from the former east
block and that is the coordinate displacment. The map coordinates are often
wrong and you will need a special table which translates the coordinates on
the map to real world coordinates. An example is Warszaw which is displaced
more than 20 km
The parameters for the baltic area can be found in
http://www.geo.ut.ee/~raivo/ESTCOORD.HTML and it also contains the main
parameters for Pulkovo 63 which is difficult to get.
Ole Gregor
Viborg Amt, Milj� og Teknik
(45) 87 27 13 07
[EMAIL PROTECTED]
> -----Original Message-----
> From: Clifford J. Mugnier [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, August 04, 1999 5:31 AM
> To: '[EMAIL PROTECTED]'; [EMAIL PROTECTED]
> Cc: '[EMAIL PROTECTED]'; '[EMAIL PROTECTED]'; '[EMAIL PROTECTED]'
> Subject: MI RE: Map Projections for Eastern Europe
>
> Stephen,
>
> Apples, oranges, and peaches.
>
> The ellipsoidal Transverse Mercator was first utilized for
> a real project by Carl Freiderich Gauss in the early 19th
> century. Kruger was one fellow (in Prussia) that re-cast
> his equations in the late 1800's to early 1900's so that it
> could be computed by mere mortals with the aid of
> logarithms, his special book of projection tables, and a
> lot of time. That was Kruger (with an umlaut over the
> "u.")
>
> After World War II, the U.S. Army Corps of Engineers cooked
> up the UTM that is based on the Gauss-Kruger (with an
> umlaut). There ARE other Transverse Mercator equations for
> some other special countries.
>
> The Russians came up with their version of UTM, but the
> scale factor at origin was unity as compared with the UTM
> that has an error of one part in 2500. Other than that,
> the two systems (and the math) is identical. The Russian
> system is identical to the Nazi "DHG." Boy, can you create
> a bar-room argument based on who did it first! Best advice
> I have is to duck! Don't spill your beer ...
>
> Before the end of World War II, Professor Krassovsky came
> up with his ellipsoid based on the vast collection of
> Russian Triangulation Arcs that were predominately
> north-south in their extents.
>
> The classical horizontal geodetic datum used in the former
> U.S.S.R. is the "SYSTEM 42," where the origin is at the
> astronomical observatory at Pulkovo. The ellipsoid of
> reference is the Krassovsky ellipsoid. That datum is a
> specific system of latitudes and longitudes that is still
> considered a military secret by the Commenwealth of
> Independent States (C.I.S.). The Russians DO use the
> Gauss-Kruger (with and umlaut) Transverse Mercator.
>
> Playing games with projections (UTM and the Russia Belts)
> will not cure your woes with data compatibility among the
> former satellite countries of the former U.S.S.R. Although
> the System 42 is a marvellous geodetic datum that is
> remarkably consistent for the entire continent from Eastern
> Europe to the Russian Far East, the existing topographic
> maps of the former USSR may not ALL be referenced to System
> 42. Beware of making generalities, especially with respect
> to datums. Changing the parameters of a Transverse
> Mercator projection within a software package will not
> accomplish much other than allow you to generate immense
> amounts of garbage data with fantastic efficiency. You are
> going to need to sit down and do a bit of reading and
> study. Perhaps a LOT of study. Maybe not; maybe your I.Q
> is over 300 and you read fast.
>
> If you don't know what a datum is, or the differences in
> different transformations from one country to another, I
> suggest you look up my past columns in "Photogrammetric
> Engineering and Remote Sensing." You can download some of
> them from the society's web site at:
>
> http://www.asprs.org/resources.html
>
> (Look under the category of "Grids and Datums"). If the
> stuff is of interest to you, consider joining the society
> and getting a monthly subscription to the granddaddy of all
> journals on the topic of "GIS." Besides which, you'll get
> the marvellous benefit of reading my ruminations each month
> on this sort of stuff. And the sarcasm is free!
> (Lagniappe in New Orleans).
>
> I have no idea what the ESRI current implementation of
> geodetic transformations is like.
>
> So, what does "AICP" mean?
>
> Cliff
>
> Clifford J. Mugnier ([EMAIL PROTECTED])
> The Topographic Engineering Laboratory
> Department of Civil and Environmental Engineering
> UNIVERSITY OF NEW ORLEANS
> New Orleans, Louisiana 70148
>
> Voice and Facsimilie: (504) 280-7095
> --------------------------------------------------------
> ---------------------------------------
> On Tuesday, 03 August, 1999 6:12 PM, Stephen Kerlin
> [SMTP:[EMAIL PROTECTED]] wrote:
> > Can anyone tell me how I can convert GAUSS KRASOVSKII OR
> > GAUSS KRUGER
> > MAP PROJECTIONS in PC Arc/Info or Arc/Info for Window NT?
> > I am doing a
> > project on Eastern Europe. Some of my maps are in the
> > Universal Transverse
> > Mercator Grid. Currently, I have an opportunity to
> > purchase Soviet Union
> > military maps with the G-K
> > projections. Can anyone tell me how I can match the two
> > types?
> >
> > Stephen Kerlin, AICP
> > [EMAIL PROTECTED]
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