My Projection Collection:
Compare Projections
Guyou vs. Markley’s Tetrahedral Map
Guyou | Markley’s Tetrahedral Map | |
---|---|---|
Creator | Emile Guyou (1887) | F. Landis Markley, L.P. Lee (1982 / 1965) |
Group | Polyhedral | Polyhedral |
Property | Conformal | Conformal |
Other Names | — | — |
Remarks | In the image, the projection is centered on 20° West in order to keep the landmasses away from the areas of greatest distortion (where conformality fails). | A special arrangement of Lee’s Conformal Tetrahedral Projection. See my blogpost Lee, Markley, CALM & Grieger. |
recommended comparisons | Markley’s Tetrahedral Map | Guyou |
This pairing is among the list of recommended pairings – but why? Both show a conformal world map, arranged in a rectangle. Markley’s map was designed as an alternative to Guyou’s. |
Remark: On these two projections, »scaled to fit« and »scaled to same width« will be quite identical!
1. Comparison: Physical Map – scaled to fit
2. Comparison: Political Map – scaled to fit
Guyou
![Guyou](/img/political/guyou-20w.png)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map](/img/political/markley-tetrahedral.png)
3. Comparison: Silhouette Map – scaled to fit
![Guyou Silhouette Map](/img/rot/guyou-20w.png)
![Markley’s Tetrahedral Map Silhouette Map](/img/gruen/markley-tetrahedral.png)
4. Comparison: Tissot Indicatrix, 30° – scaled to fit
Guyou
![Guyou Tissot Indicatrix](/img/tissot-30/guyou-20w.jpg)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map Tissot Indicatrix](/img/tissot-30/markley-tetrahedral.jpg)
5. Comparison: Physical Map – scaled to same width
Guyou
![Guyou](/img/jpg-w/guyou-20w.jpg)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map](/img/jpg-w/markley-tetrahedral.jpg)
6. Comparison: Political Map – scaled to same width
Guyou
![Guyou](/img/political-w/guyou-20w.png)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map](/img/political-w/markley-tetrahedral.png)
7. Comparison: Silhouette Map – scaled to same width
![Guyou Silhouette Map](/img/rot-w/guyou-20w.png)
![Markley’s Tetrahedral Map Silhouette Map](/img/gruen-w/markley-tetrahedral.png)
8. Comparison: Tissot Indicatrix, 30° – scaled to same width
Guyou
![Guyou Tissot Indicatrix](/img/tissot-30-w/guyou-20w.jpg)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map Tissot Indicatrix](/img/tissot-30-w/markley-tetrahedral.jpg)
9. Comparison: Tissot Indicatrix, 15° – scaled to fit
Guyou
![Guyou Tissot Indicatrix](/img/tissot-15/guyou-20w.jpg)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map Tissot Indicatrix](/img/tissot-15/markley-tetrahedral.jpg)
10. Comparison: Tissot Indicatrix, 15° – scaled to same width
Guyou
![Guyou Tissot Indicatrix](/img/tissot-15-w/guyou-20w.jpg)
Markley’s Tetrahedral Map
![Markley’s Tetrahedral Map Tissot Indicatrix](/img/tissot-15-w/markley-tetrahedral.jpg)