Create polar coordiante system

[Troedel]

Hi all,

I was wondering if anyone knows about a fast and accurate way of creating a polar coordinate system, perhaps even with doted lines as subdividers. I am by no means a mathematical creature so be gentle on me. I could eyeball it in PS but I think it would be a bit tedious. So I politly ask for suggestions?

Greetings,

Troedel

[waldronate]

You can make a rectangular grid in Photoshopand then use the Polar Coordinates filter. There are also a few templates drifting around. Many mapping tools will also do this.

[johnvanvliet]

if you are referring to remapping a simple cylindrical map to the north and south poles

gimp has had this built in for at least 10 to 15 years
gimp 2.8
filters / distorts/ polar coordinates



as to a grid
there are a few ways
MMPS can do it easily
http://www.users.globalnet.co.uk/~arcus/mmps/
the input image is a all white image ( 2:1)

project stereographic -grid -lat 90 -f input.ppm -out NorthPole.ppm

project stereographic -grid -gridcolor 255:255:255 -lat 90 -f 2k.RGBworld.ppm -out p1.ppm

[Troedel]

Thank you very much, i will look into that.