1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
.. _axisswap:
================================================================================
Axis swap
================================================================================
.. versionadded:: 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 re-ordered 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 axis-number::
+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
################################################################################
.. option:: +order=<list>
Ordered comma-separated 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.*
|
