Axis swap¶
New in version 5.0.0.
Change the order and sign of 2,3 or 4 axes.
Alias 
axisswap 
Domain 
2D, 3D or 4D 
Input type 
Any 
Output type 
Any 
Each of the possible four axes are numbered with 1–4, such that the first input axis is 1, the second is 2 and so on. The output ordering is controlled by a list of the input axes reordered to the new mapping.
Usage¶
Reversing the order of the axes:
+proj=axisswap +order=4,3,2,1
Swapping the first two axes (x and y):
+proj=axisswap +order=2,1,3,4
The direction, or sign, of an axis can be changed by adding a minus in front of the axisnumber:
+proj=axisswap +order=1,2,3,4
It is only necessary to specify the axes that are affected by the swap operation:
+proj=axisswap +order=2,1
Parameters¶

+order
=<list>
¶ Ordered commaseparated list of axis, e.g. +order=2,1,3,4. Adding a minus in front of an axis number results in a change of direction for that axis, e.g. southward instead of northward.
Required.