Equirectangular Projection controlling distortion with Tissot’s Indicatrix or similar

[Vigilus]

Are there any software programs that allow you to import an equirectangular projection and manually play with the distortion on it? I have an "almost" equirectangular map that is the result of a lot of work using unorthodoxed methods, going from 3d to 2d using a 3d scanner. The final process has resulted in an equirectangular projection that is 12 degrees off in distortion at the poles (they are too large), resulting in something between a mercator projection and an equirectangular projection(and I don't mean quantitatively). I'm looking to fix this by adjusting the distortion and making this a true equirectangular projection, the final result doesn't have to be exact, just close enough.

Any help locating software that can do this and any pointers are welcome!

Thanks!

[waldronate]

Sadly, it looks like http://flexprojector.com/ doesn't do raster things. Otherwise, it would pretty much be what you want.

You might be able to use a georeferencer-type piece of software to do this. QGIS has such a plugin, I'm told.

Something like Photoshop's warp tool might work. Or its perspective tool (basically, select the area with the distortion and stretch one side until it's what you want). I would recommend doing this to another layer with slightly more area selected than you need, followed by a nice blend between the two to avoid any discontinuities.

If you find something that works for you, be sure to report back about how you did it.

[Vigilus]

Sadly, it looks like http://flexprojector.com/ doesn't do raster things. Otherwise, it would pretty much be what you want.

You might be able to use a georeferencer-type piece of software to do this. QGIS has such a plugin, I'm told.

Something like Photoshop's warp tool might work. Or its perspective tool (basically, select the area with the distortion and stretch one side until it's what you want). I would recommend doing this to another layer with slightly more area selected than you need, followed by a nice blend between the two to avoid any discontinuities.

If you find something that works for you, be sure to report back about how you did it.

Photoshop Edit/Transform/Warp worked for me! I also used some post it notes for evening up the lines. Thanks again Waldronate! This was a vastly easier problem solution than I thought possible, so fun to learn something new about Photoshop.

Cheers!