Fil:Types of latitude difference.png

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Contents

[edit] Summary

Description

Comparison between different types of latitude (common, reduced, authalic, rectifying, conformal, geocentric) that shows the difference from the common latitude

Source

Own work with the help of gnuplot

Date

August 16, 2006

Author

User:Cburnett

Permission

GFDL

Other versions Image:Types of latitudes original.png (shows actual values)

[edit] Source

The following gnuplot code is released under the GPL:

GNU head This work 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 2 of the License, or any later version. This work 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.

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set term png small notransparent
set output "Types of latitude difference.png"

set title "Types of Latitude"
set xlabel "Common Latitude (Degrees)"
set xtics nomirror 0,5,90
set xrange [-1:91]

set ylabel "Difference from Common Latitude (Minutes)"
set ytics nomirror 0,1,12
set yrange [-1:13]

set size 0.8,0.8

set key left top

plot \
    "data_difference.dat" using 1:2 title 'Common', \
    "data_difference.dat" using 1:3 title 'Reduced', \
    "data_difference.dat" using 1:4 title 'Authalic', \
    "data_difference.dat" using 1:5 title 'Rectifying', \
    "data_difference.dat" using 1:6 title 'Conformal', \
    "data_difference.dat" using 1:7 title 'Geocentric'


[edit] Source data

The following data was taken from and saved in data_difference.dat:

0.00    0.00    0.00    0.00    0.00    0.00    0.00
5.00    0.00    1.01    1.35    1.52    2.02    2.02
10.00   0.00    1.99    2.66    2.99    3.98    3.98
15.00   0.00    2.91    3.89    4.37    5.82    5.82
20.00   0.00    3.75    5.00    5.62    7.48    7.48
25.00   0.00    4.47    5.96    6.70    8.92    8.92
30.00   0.00    5.05    6.73    7.57    10.09   10.09
35.00   0.00    5.48    7.31    8.22    10.95   10.96
40.00   0.00    5.75    7.66    8.62    11.48   11.49
45.00   0.00    5.84    7.78    8.76    11.67   11.67
50.00   0.00    5.75    7.67    8.63    11.50   11.50
55.00   0.00    5.49    7.32    8.23    10.97   10.98
60.00   0.00    5.06    6.75    7.59    10.12   10.13
65.00   0.00    4.48    5.97    6.72    8.95    8.96
70.00   0.00    3.76    5.01    5.64    7.52    7.52
75.00   0.00    2.92    3.90    4.39    5.85    5.85
80.00   0.00    2.00    2.67    3.00    4.00    4.01
85.00   0.00    1.02    1.35    1.52    2.03    2.03
90.00   0.00    0.00    0.00    0.00    0.00    0.00

[edit] Licensing

The image itself is released under the GFDL:

I, the author of this work, hereby publish it under the following license:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

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