Compare Map Projections

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Compare Projections

Gall Isographic vs. Equirectangular (35.6°)

Select two projections:

Projection No. 1:

Projection No. 2:

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  Gall Isographic Equirectangular (35.6°)
Creator James Gall (1855) Marinus of Tyre (about AD 100)
Group Cylindric Cylindric
Property Compromise Equidistant
Other Names
Remarks Gall Isographic is the equirectangular projection with standard parallels at 45° North/South. Here: Standard parallels at 35.6° (= 35° 36′) North/South in order to get the aspect ratio of the Patterson projection.
recommended comparisons Equirectangular (0°)
Equirectangular (35.6°)
Gall Isographic
Patterson
This pairing is among the list of recommended pairings – but why?
It’s the same projection, but using different standard parallels.

1. Comparison: Physical Map – scaled to fit

Gall Isographic
Gall Isographic Projection
Equirectangular (35.6°)
Equirectangular (35.6°) Projection

2. Comparison: Silhouette Map – scaled to fit

Click on projection’s name to hide it
Grey areas: Superimposition of projections
Gall Isographic Silhouette Map
Equirectangular (35.6°) Silhouette Map

3. Comparison: Tissot Indicatrix, 30° – scaled to fit

Gall Isographic
Gall Isographic Tissot Indicatrix
Equirectangular (35.6°)
Equirectangular (35.6°) Tissot Indicatrix

4. Comparison: Physical Map – scaled to same width

Gall Isographic
Gall Isographic Projection
Equirectangular (35.6°)
Equirectangular (35.6°) Projection

5. Comparison: Silhouette Map – scaled to same width

Click on projection’s name to hide it
Grey areas: Superimposition of projections
Gall Isographic Silhouette Map
Equirectangular (35.6°) Silhouette Map

6. Comparison: Tissot Indicatrix, 30° – scaled to same width

Gall Isographic
Gall Isographic Tissot Indicatrix
Equirectangular (35.6°)
Equirectangular (35.6°) Tissot Indicatrix

7. Comparison: Tissot Indicatrix, 15° – scaled to fit

Gall Isographic
Gall Isographic Tissot Indicatrix
Equirectangular (35.6°)
Equirectangular (35.6°) Tissot Indicatrix

8. Comparison: Tissot Indicatrix, 15° – scaled to same width

Gall Isographic
Gall Isographic Tissot Indicatrix
Equirectangular (35.6°)
Equirectangular (35.6°) Tissot Indicatrix
 

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