[Proj] Help!!
OvV_HN
ovv at hetnet.nl
Tue Jul 1 07:24:01 EDT 2008
From: "Gerald I. Evenden" <geraldi.evenden at gmail.com>
Sent: Monday, June 30, 2008 8:15 PM
Subject: [Proj] Help!!
>I have been trying to update libproj4 documentation and also keep the
> carto.bib file reasonably up to date. But sometimes this gets to a bit
> difficult with some sources.
>
> I writing up proj=ftmerc, one of the 4 constant meridian scale transverse
> Mercator projection procedures I am at a loss to describe this source:
>
> www.lantmateriet.se/geodesi
>
> Unfortunately, it is *all* in Swedish and without a hint of who or what.
>
> Any hint as to what an appropriate reference entry would be would be
> greatly
> appreciated.
For the functions used in ftmerc, the Swedish Landmäteriet is not the
primary reference.
It would be interesting to know where these functions came from.
My theory: they percolated from Krüger (1912) through - among others - König
& Weise (1951), to Hirvonen (1970).
I copied some of the older references from the Finnish JHS154 publication:
* Hirvonen, R.A., Matemaattinen Geodesia, Teknillisen korkeakoulun
ylioppilas-kunta, Helsinki, 1972
* Hirvonen, R.A. The Use of Subroutines in Geodetic Computations,
Maanmit-taus, 1970.
* Krüger L: Konforme Abbildung des Erdellipsoids in der Ebene, B. G. Teubner
Verlag Leipzig 1912, pages 11-22
* König, R.; Weise, K. H.: Mathematische Grundlagen der höheren Geodäsie und
Kartographie, Springer Verlag Berlin Göttingen Heidelberg, 1951
Remarkably, most papers describing the Italian Gauss-Boaga system, refer to
Hirvonen.
Cliff Mugnier says in his Grids & Datums column about Italy that Boaga
recasted (and truncated) the Gauss equations. This can also be inferred from
a short biography of Giovanni Boaga at the IGM site:
http://www.igmi.org/istituto/scuola/boaga.php
IGM: Istituto Geografico Militare
Oscar van Vlijmen
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