Larger political databases

General discussion of map projections.
Piotr
Posts: 313
Joined: Thu Mar 23, 2017 12:27 pm

Re: Larger political databases

Post by Piotr »

To achieve this 5760x2880 version, I followed these steps:

1. get 1500x1440 left cut from the 2880x1440 image, and a similar cut for the right side
2. scale both images with Waifu2x (medium noise reduction)
3. cut left 2880x2880 of first result, and right 2880x2880 of second result
4. join the halves

To avoid wasting space on this huge database image, this database is in Dropbox.

https://www.dropbox.com/s/3bx05027j8tf4 ... 0.TIF?dl=0
Atarimaster
Posts: 446
Joined: Fri Nov 07, 2014 2:43 am

Re: Larger political databases

Post by Atarimaster »

That’s a great result considering that it’s a low-res image which was puffed up!

The three versions of a politcal map that I’ve used so far can be viewed (projected to Patterson) here (v1) and here (v2) and here (v3).

In case anyone’s interested, I can provide the plate carrée files of v1 and v2 (which work fine with Geocart), both are 4000 x 2000.
v3 however, although I already used it on my website, is not quite finished and I’d still like to improve some details before I think about releasing it.
Piotr
Posts: 313
Joined: Thu Mar 23, 2017 12:27 pm

Re: Larger political databases

Post by Piotr »

Of course one can't recover all details from a small image, so the larger versions are imperfect, but still much better than the standard political databases.

Here is a huge (3600 height, excluding the border) map using this database, using Point-pole Winkel Tripel (Aitoff mixed with loximuthal, loximuthal standard parallel is 0 and loximuthal is shrunk horizontally by 0.70710678), with 5 degree graticule:
https://www.dropbox.com/s/gol9lkl40l0um ... p.PNG?dl=0

Feel free to use this as a wall-map, add your own labels, etc.
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