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F13 Copycat vs. Frančula XIII

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Projection No. 2:

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  F13 Copycat Frančula XIII
Creator Karlheinz Wagner, Tobias Jung (1941 / 2020) Nedjeljko Frančula (1971)
Group Lenticular Lenticular
Property Compromise Compromise
Other Names
  • Wagner vii@60-77-60-45-170
Remarks Wagner VII variant, configuration 60-77-60-45-170 (using the Böhm notation, see Umbeziffern – The Wagner Transformation Method.

Experimental, a Frančula XIII copycat, with bit less areal inflation.

Briefly introduced in my blog.
A Wanger IX variant, derived by Umbeziffern from the equatorial azimuthal equidistant projection, minimized distortion by application of the Airy-Kavrayskiy criterion.
For more information, refer to my blogpost The Frančula Projections or Frančula’s original paper Die vorteilhaftesten Abbildungen in der Atlaskartographie (German).
recommended comparisons Frančula XIII Canters-Frančula
F13 Copycat
Gott-Wagner
This pairing is among the list of recommended pairings – but why?
The F13 Copycat deliberately approaches certain properties of the Frančula XIII (aspect ratio, length and curvature of the pole line) but the distribution of meridians and parallels is different.

1. Comparison: Physical Map

F13 Copycat
F13 Copycat
Frančula XIII
Frančula XIII

2. Comparison: Political Map

F13 Copycat
F13 Copycat
Frančula XIII
Frančula XIII

3. Comparison: Silhouette Map

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Grey areas: Superimposition of projections
F13 Copycat Silhouette Map
Frančula XIII Silhouette Map

4. Comparison: Tissot Indicatrix, 30°

F13 Copycat
F13 Copycat Tissot Indicatrix
Frančula XIII
Frančula XIII Tissot Indicatrix
 

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