%%%% sundl_03.txt %%%% Created by Laurence D. Finston (LDF) Wed Oct 10 23:48:29 CEST 2007 %% $Id: sundl_03.txt,v 1.6 2007/10/11 11:44:41 lfinsto1 Exp $ %% * (1) Copyright and License. %%%% This file is part of GNU 3DLDF, a package for three-dimensional drawing. %%%% Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 The Free Software Foundation, Inc. %%%% GNU 3DLDF is free software; you can redistribute it and/or modify %%%% it under the terms of the GNU General Public License as published by %%%% the Free Software Foundation; either version 3 of the License, or %%%% (at your option) any later version. %%%% GNU 3DLDF is distributed in the hope that it will be useful, %%%% but WITHOUT ANY WARRANTY; without even the implied warranty of %%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the %%%% GNU General Public License for more details. %%%% You should have received a copy of the GNU General Public License %%%% along with GNU 3DLDF; if not, write to the Free Software %%%% Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA %%%% GNU 3DLDF is a GNU package. %%%% It is part of the GNU Project of the %%%% Free Software Foundation %%%% and is published under the GNU General Public License. %%%% See the website http://www.gnu.org %%%% for more information. %%%% GNU 3DLDF is available for downloading from %%%% http://www.gnu.org/software/3dldf/LDF.html. %%%% Please send bug reports to Laurence.Finston@gmx.de %%%% The mailing list help-3dldf@gnu.org is available for people to %%%% ask other users for help. %%%% The mailing list info-3dldf@gnu.org is for the maintainer of %%%% GNU 3DLDF to send announcements to users. %%%% To subscribe to these mailing lists, send an %%%% email with ``subscribe '' as the subject. %%%% The author can be contacted at: %%%% Laurence D. Finston %%%% Kreuzbergring 41 %%%% D-37075 Goettingen %%%% Germany %%%% Laurence.Finston@gmx.de %% * (1) \input epsf \font\small=cmr8 \font\large=cmr12 \font\Large=cmr17 \font\huge=cmr17 scaled \magstep2 \font\largebx=cmbx12 \font\Largebx=cmbx17 \font\hugebx=cmbx17 scaled \magstep2 \def\leaderfill{\leaders\hbox to 1em{\hss.\hss}\hfill} %% Uncomment for DIN A3 portrait. \special{papersize=297mm, 420mm} %% DIN A3 Portrait \vsize=420mm \hsize=297mm \advance\voffset by -1in \advance\hoffset by -1in \advance\voffset by 1in \advance\hoffset by 1cm \parindent=0pt \def\epsfsize#1#2{#1} %% ** (2) %% *** (3) %% *** (3) \newcount\currpg \currpg=1 \headline={\hfil} \iftrue % \iffalse \pageno=-1 %\pageno=0 \vskip.5cm \centerline{Sundials 3} \vskip\baselineskip \centerline{Laurence D. Finston} \vskip\baselineskip \centerline{Last updated: October 11, 2007} \vskip2cm %\centerline{\hskip.5cm\epsffile{3DLDFmp.0}} % \iftrue % \iffalse {\small \hsize=.75\hsize %\hskip1cm \vbox{\vskip2\baselineskip This document is part of GNU 3DLDF, a package for three-dimensional drawing. \vskip\baselineskip !Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 The Free Software Foundation, Inc. \vskip\baselineskip GNU 3DLDF is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. \vskip\baselineskip GNU 3DLDF is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. \vskip\baselineskip You should have received a copy of the GNU General Public License along with GNU 3DLDF; if not, write to the Free Software Foundation, Inc.,\hfil\break 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA \vskip\baselineskip See the GNU Free Documentation License for the copying conditions that apply to this document. \vskip\baselineskip You should have received a copy of the GNU Free Documentation License along with GNU 3DLDF; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA}} \fi \vskip2cm \fi %% *** (3) Contents \advance\voffset by 1in \advance\hoffset by 1in \iftrue % \iffalse \ifnum\pageno<0\else\pageno=-1\fi \begingroup \parindent=0pt \parskip=0pt \advance\baselineskip by 2pt \dimen0=15cm \centerline{\bf Contents} \vskip 2cm %\hbox to \dimen0{Projection onto Equatorial Plane % %(Same for Any Latitude)\leaderfill 1} % %% **** (4) % \hbox to \dimen0{Perspective Projections\hfil} \hbox to \dimen0{Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E \leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{Athens, Greece $37^\circ$ $58'$ N $23^\circ$ $43'$ E\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{Chicago, Illlinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W \leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{London, UK $51^\circ$ $30'$ $28''$ N $0^\circ$ $7'$ $41''$ W\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{G{\"o}ttingen, Germany $51^\circ$ $32'$ N $9^\circ$ $56'$ E\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% Jerusalem %% \hbox to \dimen0{Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% Athens %% \hbox to \dimen0{Athens, Greece $37^\circ$ $58'$ N $23^\circ$ $43'$ E\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% Chicago %% \hbox to \dimen0{Chicago, Illlinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% London %% % latitude := 51.5777 %% London \hbox to \dimen0{London, UK $51^\circ$ $30'$ $28''$ N $0^\circ$ $7'$ $41''$ W\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% Goettingen %% \hbox to \dimen0{G{\"o}ttingen, Germany $51^\circ$ $32'$ N $9^\circ$ $56'$ E\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% %% St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E %% \hbox to \dimen0{St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \hbox to \dimen0{\hskip2em Perspective projection\leaderfill \the\currpg} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Vertical Dial, Facing Due South\leaderfill 19} \global\advance\currpg by 1 \hbox to \dimen0{\hskip2em Horizontal Dial\leaderfill \the\currpg} \global\advance\currpg by 1 %% \endgroup \vfil\eject \fi \advance\voffset by -.5in \advance\hoffset by -1in %% **** (4) End of contents %% *** (3) Page 0 (conditional) %\iftrue \iffalse \pageno=0 \vbox to \vsize{% \vskip.5cm \line{\hskip1cm\epsffile{sundl_03.0}\hss} \vss } \vfil\eject \fi %% *** (3) Headline \iftrue % \iffalse !\headline={Sundials 3\quad Copyright {\copyright} 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 The Free Software Foundation, Inc.\hfil % \folio\hfil Author: Laurence D. Finston\hfil} \fi %% *** (3) Perspective projections \pageno=1 %% **** (4) Jerusalem, Israel \vbox to \vsize{% \vskip1cm \centerline{{\bf Jerusalem, Israel} $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.1}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% **** (4) Athens \vbox to \vsize{% \vskip1cm \centerline{{\bf Athens, Greece} $37^\circ$ $58'$ N $23^\circ$ $43'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.4}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $41^\circ$ $54'$ N (Athens, Greece)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% **** (4) Chicago \vbox to \vsize{% \vskip1cm \centerline{{\bf Chicago, Illinois, USA} $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.7}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Chicago, Illinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% **** (4) London \vbox to \vsize{% \vskip1cm \centerline{{\bf London, UK} $51^\circ$ $30'$ $28''$ N, $0^\circ$ $7'$ $41''$ W\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.10}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $51^\circ$ $30'$ $28''$ N (London, UK)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% **** (4) Goettingen 51 deg. 32' N, 9 deg. 56' E \vbox to \vsize{% \vskip1cm \centerline{{\bf G{\"o}ttingen, Germany} $51^\circ$ $32'$ N, $9^\circ$ $56'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.13}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $51^\circ$ $32'$ N (G{\"o}ttingen, Germany)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% **** (4) St.~Petersburg $59^\circ$ $56'$ N, $30^\circ$ $20'$ E \vbox to \vsize{% \vskip1cm \centerline{{\bf St.~Petersburg, Russia} $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.16}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $51^\circ$ $32'$ N (G{\"o}ttingen, Germany)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject %% *** (3) Cities %% **** (4) Jerusalem \vbox to \vsize{% \vskip1cm \centerline{{\bf Jerusalem, Israel} $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.1}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Jerusalem, Israel} $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.2}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Jerusalem, Israel} $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.3}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$)\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm Jerusalem, Israel $31^\circ$ $47'$ N, $35^\circ$ $13'$ E\hfil} \vss} \vfil\eject %% **** (4) Athens \vbox to \vsize{% \vskip1cm \centerline{{\bf Athens, Greece} $37^\circ$ $58'$ N $23^\circ$ $43'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.4}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $41^\circ$ $54'$ N (Athens, Greece)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Athens, Greece} $37^\circ$ $58'$ N $23^\circ$ $43'$ E\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.5}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm Latitude $41^\circ$ $54'$ N (Athens, Greece)\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Athens, Greece} $37^\circ$ $58'$ N $23^\circ$ $43'$ E\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.6}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$)\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm Latitude $41^\circ$ $54'$ N (Athens, Greece)\hfil} \vss} \vfil\eject %% **** (4) Chicago \vbox to \vsize{% \vskip1cm \centerline{{\bf Chicago, Illinois, USA} $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.7}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Chicago, Illinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Chicago, Illinois, USA} $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.8}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm Chicago, Illinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf Chicago, Illinois, USA} $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.9}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$)\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm Chicago, Illinois, USA $41^\circ$ $52'$ $55''$ N $87^\circ$ $37'$ $40''$ W\hfil} \vss} \vfil\eject %% **** (4) London \vbox to \vsize{% \vskip1cm \centerline{{\bf London, UK} $51^\circ$ $30'$ $28''$ N, $0^\circ$ $7'$ $41''$ W\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.10}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $51^\circ$ $30'$ $28''$ N (London, UK)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf London, UK} $51^\circ$ $30'$ $28''$ N, $0^\circ$ $7'$ $41''$ W\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.11}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm Latitude $51^\circ$ $30'$ $28''$ N (London, UK)\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf London, UK} $51^\circ$ $30'$ $28''$ N, $0^\circ$ $7'$ $41''$ W\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.12}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$)\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm Latitude $51^\circ$ $30'$ $28''$ N (London, UK)\hfil} \vss} \vfil\eject %% **** (4) Goettingen 51 deg. 32' N, 9 deg. 56' E \vbox to \vsize{% \vskip1cm \centerline{{\bf G{\"o}ttingen, Germany} $51^\circ$ $32'$ N, $9^\circ$ $56'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.13}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm Latitude $51^\circ$ $32'$ N (G{\"o}ttingen, Germany)\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf G{\"o}ttingen, Germany} $51^\circ$ $32'$ N, $9^\circ$ $56'$ E\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.14}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm Latitude $51^\circ$ $32'$ N (G{\"o}ttingen, Germany)\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf G{\"o}ttingen, Germany} $51^\circ$ $32'$ N, $9^\circ$ $56'$ E\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.15}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$).\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm Latitude $51^\circ$ $32'$ N (G{\"o}ttingen, Germany)\hfil} \vss} \vfil\eject %% **** (4) St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E \vbox to \vsize{% \vskip1cm \centerline{{\bf St.~Petersburg, Russia} $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vskip1cm \line{\hskip1cm\epsffile{sundl_03.16}\hss} \vskip1cm \line{\hskip 2cm{\bf Perspective projection}\hfil} \line{\hskip 2cm St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \line{\hskip 2cm Focus: $\rm{position} = (0, 5, -12)$, % $\rm{direction} = (0, 5, 10)$, % $\rm{distance} = 10$\hfil} \line{\hskip 2cm (dimensions in centimeters)\hfil} \vss } \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf St.~Petersburg, Russia} $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vskip1cm \line{\hskip 2cm\epsffile{sundl_03.17}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the vertical plane} (plane of $r_1$)\hfil} \line{\hskip 2cm Vertical dial facing due south\hfil} \line{\hskip 2cm St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vss} \vfil\eject \vbox to \vsize{% \vskip2cm \centerline{{\bf St.~Petersburg, Russia} $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vskip1cm \line{\hskip 0cm\epsffile{sundl_03.18}\hss} \vskip2cm \line{\hskip 2cm{\bf Parallel projection onto the horizontal plane} (plane of $r_6$).\hfil} \line{\hskip 2cm Horizontal dial\hfil} \line{\hskip 2cm St.~Petersburg, Russia $59^\circ$ $56'$ N, $30^\circ$ $20'$ E\hfil} \vss} \vfil\eject %% **** (4) End here. \bye %% * (1) Local variables for Emacs. %% Local Variables: %% mode:plain-TeX %% outline-regexp:"%% [*\f]+" %% End: