This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionLatitude and longitude graticule on a sphere.svg
English: Figure showing definition of latitude (φ) and longitude (λ) on a sphere. The graticule at intervals of 10 degrees is taken from Sphere-wireframe.png at Commons.
The source code of this SVG is invalid due to 4 errors.
This W3C-invalid diagram was created with Inkscape, or with something else.
Licensing
Public domainPublic domainfalsefalse
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Captions
Add a one-line explanation of what this file represents
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Short title
Sphere wireframe
Image title
Sphere wireframe
depicted with perspective projection
viewer distance from center: 10r
line distancd: 10°
line width: 2°
axial tilt: 37.5°
rotation: 7.5°
base color: #22326b
plotted with several adapted cubic bezier-curves
The plotcurves were calculated by some fancy python code. The bezier-curve
controlpoints are placed on tangents of the function-curve. They are
furthermore positioned in a way to minimize the average quadratic distance
between the bezier-curve and the function. This gives an accuracy, so that
the deviation is in no point greater than 0.00001.