Transform data from 0 to 360° to -180 to 180° (surface aspect of a glacier)

[jones123]

Transform data from 0 to 360° to -180 to 180° (surface aspect of a glacier)

Hi all,

I have data from the surface aspect of a glacier surface, ranging from 0° (N) to 90° (E) to 180° (S) to 270° (W) to 360° (N). I want to transform these data so that they go from 180° (N) to 90° (E) to 0° (S) to -90° (W) to -180° (N).

How can I achieve this?
Thanks!

 

[Dr.Peterson]

Hi all,

I have data from the surface aspect of a glacier surface, ranging from 0° (N) to 90° (E) to 180° (S) to 270° (W) to 360° (N). I want to transform these data so that they go from 180° (N) to 90° (E) to 0° (S) to -90° (W) to -180° (N).

How can I achieve this?
Thanks!

It looks to me like all you have to do is to subtract the given angle from 180 to get the new angle: 180 - theta.