My Projection Collection:
Compare Projections
Cahill Conformal Butterfly vs. Waterman Butterfly (alternative arrangement)
| Cahill Conformal Butterfly | Waterman Butterfly (alternative arrangement) | |
|---|---|---|
| Creator | Bernard J. S. Cahill, Oscar S. Adams (1929 approx.) | Steve Waterman (1996) |
| Group | Polyhedral | Polyhedral |
| Property | Conformal | Compromise |
| Other Names | — | — |
| Remarks | In 1909, Cahill developed his first (compromise) butterfly map. He succeeded in having Oscar S. Adams develop the mathematics for a conformal version, which he published in 1929. In Cahill’s original arrangement, Africa was placed in the upper left lobe, the map shown here was centered on 20° West. See Four conformal polyhedric projections and more. |
Inspired by the butterfly map by Bernard J. S. Cahill (1903). Usually, the four tips which show Antarctica get cut off to be assembled in an »island« below the butterfly. More information in my blog. |
| recommended comparisons | Cahill Conformal, M-shaped Waterman Butterfly |
Cahill Conformal Butterfly Cahill-Keyes |
|
This pairing is among the list of recommended pairings – but why? Two butterfly projections – one being conformal (Cahill), the other one being a compromise projection (Waterman). |
||
1. Comparison: Physical Map – scaled to fit
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
2. Comparison: Political Map – scaled to fit
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
3. Comparison: Silhouette Map – scaled to fit
Cahill Conformal Butterfly Silhouette Map c Tobias Jung
Waterman Butterfly (alternative arrangement) Silhouette Map c Tobias Jung
4. Comparison: Tissot Indicatrix, 30° – scaled to fit
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
Cahill Conformal Butterfly Tissot Indicatrix c Tobias Jung
Waterman Butterfly (alternative arrangement) Tissot Indicatrix c Tobias Jung
5. Comparison: Physical Map – scaled to same width
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
6. Comparison: Political Map – scaled to same width
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
7. Comparison: Silhouette Map – scaled to same width
Cahill Conformal Butterfly Silhouette Map c Tobias Jung
Waterman Butterfly (alternative arrangement) Silhouette Map c Tobias Jung
8. Comparison: Tissot Indicatrix, 30° – scaled to same width
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
Cahill Conformal Butterfly Tissot Indicatrix c Tobias Jung
Waterman Butterfly (alternative arrangement) Tissot Indicatrix c Tobias Jung
9. Comparison: Tissot Indicatrix, 15° – scaled to fit
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
Cahill Conformal Butterfly Tissot Indicatrix c Tobias Jung
Waterman Butterfly (alternative arrangement) Tissot Indicatrix c Tobias Jung
10. Comparison: Tissot Indicatrix, 15° – scaled to same width
Cahill Conformal Butterfly
Waterman Butterfly (alternative arrangement)
Cahill Conformal Butterfly Tissot Indicatrix c Tobias Jung
Waterman Butterfly (alternative arrangement) Tissot Indicatrix c Tobias Jung