Atarimaster wrote:This really looks interesting!
Thanks for sharing, I’m looking forward to try it in Geocart.
Kind regards,
Tobias
Actually, you already can. See the diagram of the method here:
https://www.mapthematics.com/Downloads/Progression.png
You have projections
A and
B and you want a projection somewhere between them, with
k being the “distance” between
A and
B, and 0 ≤
k ≤ 1.
- Project to A. Use high resolution inversely proportional to k. If k < ½, consider going from B to A instead.
- Scale projected A by k.
- Export your k∙A projection as a TIFF image, preserving the high resolution.
- Place the k∙A image on a new document.
- Make a new map A at the original scale. Center A on k∙A.
- Export the map as a reprojection database.
- Make a new map in projection B. Add the reprojection database, and turn off the graticule and outer boundaries.
- Scale the new map by 1/k.
In Step 5, I say to “center” the map, but it’s more nuanced than that. If you don’t want any more steps involved, then you need to find the point in
A that has no distortion and overlay it onto the image at the same place. However, the process can still work even if the point you want to be the “center” has distortion. It just requires more steps involving scaling.
It’s a manually intensive process, but you can experiment to heart’s content. Let me know if you need more information on how to do this.
Best,
— daan
