Map bug for sinuosidal map?

I just update from G’MIC 3.4.2 to 3.4.3 and the sinusoidal map does not behave like before.

It does not squeeze anymore at the top and bottom tips but instead remove that part of image between gores

“Original” image

Also the straight lines are all bent in one direction only, instead of being “mirrored” from the center
(You can also see that the top and bottom of the gores are not squeezed in the example below, and Norway did lost a lot of lands :grin: )

An example with “Triangular Projection” which is correct (but sure triangular :wink: ), where it is squeezed properly and straight lines “mirrored”.

I forgot, G’MIC downloaded from gmic.eu the deb package for ubuntu 20.04 G’MIC for Ubuntu - All interfaces (.deb packages)

Hello @PixLab ,
could you please show me what would be the expected result with the “Sinusoidal Map” filter ?
I don’t really get it.
Thanks !

where can I get the older version of G’MIC? Because now I have the latest version (the one with a problem), and I cannot reproduce the older version.


OK I did found an old screenshot over-there Map gores (Globe gores) and other map projections in GIMP with G'MIC

How it is now, the planet is missing part between gores, for example Norway miss some east coastal lands

Before, nothing was missing like on this screenshot of G’MIC v 3.3.5 below,
Look at the North pole on the 5th gore (the white on top), the one above (problem), and the one below (no problem),
If I have to cut with scissors and glue to a ball (that’s the purpose of those gore), the one above will not do Earth properly as it will miss some part and the scale at the north and the south pole will be wrong, on the contrary the one Below this gore will properly represent Earth on a ball.

because thinner the part of the gore more squeezed were those part of the map, thus missing nothing.
In the latest version, now the sinusoidal just cut out and bent on the left side, instead of doing a proper map gore.

Not sure I explained well…
Do not hesitate to ask for another example, I’m not sure how I explained

Here, all previous Ubuntu packages : Index of /files/linux

1 Like

Whatever version I install, it is not working anymore :face_exhaling:

But I might have a good example of why it is not working properly, for instance… Where is France’s Brittany, Spain, and UK in the result below? :wink:

Original image image > Equirectangular projection - Wikipedia

After doing the gores the image is still stretched “equirectangular” we can see it well at the north and south pole, instead of getting their normal size like it was in the old screenshot I posted (see below).
There is no missing country :wink:

I think all goes back to G’MIC 3.3.5, because I have 2 screenshots with different result for the same G’MIC version, the pre-release was working as intended, then an update to 3.3.5 stable? and it stops to work as intended