Mode of Comparison: Simple Mode vs. Expert Mode

In Easy Mode the projections are compared using three different images (per projection):

  1. Physical Map: you can see one projection image at a time.
    Click on the image (or the accompanying button) to view the image of the second projection. Going back and forth, you’ll discover the differences.
  2. Silhouette Map: Both projections at a time, superimposed.
  3. Tissot’s Indicatrix (in intervals at 30°): Distortion visualization. Again, you have to click on the image to toggle display of projection #1 and #2.

On easy mode, all images are scaled to fit – which means, they are scaled to fit best into a frame of 2:1 aspect ratio. In many cases that will result in both projection having the same height.

In Expert Mode, five images will be added, so you get eight images per projection.
Firstly, the three images mentioned above will be shown again – but now, the two projections are scaled to same width: Some pairs of projections can be compared better this way.
That’s a total of six images by now.

Secondly, Tissot’s Indicatrix is shown again, but at intervals of 15 degree: That’s more accurate than the one mentioned above, but tends to be a bit confusing (that’s why I stuffed to the expert mode).
Again, in two versions: Scaled to fit + scaled to same width.
So that’s a total of eight images in the expert mode.

 
Sounds complicated? – Maybe the chart below will help.
Click the example images to toggle between the display of Ginzburg VI and Wagner IX; that hopefully will explain the difference between scaled to fit and scaled to same width.

No. Mode Description Example
1 Simple and Expert Mode
Physical map,
scaled to fit

Ginzburg VI

Ginzburg 6

Wagner IX

2 Silhouette map,
scaled to fit

Ginzburg VI

Wagner IX

3 Tissot’s indicatrix, 30°,
scaled to fit

Ginzburg VI

Wagner IX

4 Expert Mode only
Physical map,
scaled to same width

Ginzburg VI

Wagner IX

5 Silhouette map,
scaled to same width

Ginzburg VI

Wagner IX

6 Tissot’s indicatrix, 30°,
scaled to same width

Ginzburg VI

Wagner IX

7 Tissot’s indicatrix, 15°,
scaled to fit

Ginzburg VI

Wagner IX

8 Tissot’s indicatrix, 15°,
scaled to same width

Ginzburg VI

Wagner IX

Further Notes

– For more information about the different scaling methods, read »Scaled to fit« vs. »Scaled to same width«

– For some projections, there are no silhouette or Tissot images!
As a rule, this applies for all the projection images which have oceans with flat blue turquoise tint (instead of the dark blue relief ocean) on the physical map: Those are projections that I couldn’t generate with the software I’m using so I had to rely on images downloaded from other (free) sources – but silhouette images or a display of Tissot’s indicatrix weren’t available.

– If you want just want to view a single projection without comparing it to another one, just visit the Single View section!

 

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