1i.ortho.transform(1)        GRASS GIS User's Manual       i.ortho.transform(1)
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NAME

6       i.ortho.transform   - Computes a coordinate transformation based on the
7       control points.
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KEYWORDS

10       imagery, orthorectify, transformation, GCP
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SYNOPSIS

13       i.ortho.transform
14       i.ortho.transform --help
15       i.ortho.transform  [-srxp]   group=name    [format=string[,string,...]]
16       [coords=name]   [--help]  [--verbose]  [--quiet]  [--ui]
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18   Flags:
19       -s
20           Display summary information
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22       -r
23           Reverse transform of coords file or coeff. dump
24           Target east,north,height coordinates to local x,y,z
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26       -x
27           Display transform matrix coefficients
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29       -p
30           Enable panorama camera correction
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32       --help
33           Print usage summary
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35       --verbose
36           Verbose module output
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38       --quiet
39           Quiet module output
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41       --ui
42           Force launching GUI dialog
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44   Parameters:
45       group=name [required]
46           Name of input imagery group
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48       format=string[,string,...]
49           Output format
50           Options: idx, src, dst, fwd, rev, fxy, rxy, fd, rd
51           Default: fd,rd
52           idx: point index
53           src: source coordinates
54           dst: destination coordinates
55           fwd: forward coordinates (destination)
56           rev: reverse coordinates (source)
57           fxy: forward coordinates difference (destination)
58           rxy: reverse coordinates difference (source)
59           fd: forward error (destination)
60           rd: reverse error (source)
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62       coords=name
63           File containing coordinates to transform ("-" to read from stdin)
64           Local x,y,z coordinates to target east,north,height
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DESCRIPTION

67       i.ortho.transform  is  an  utility to compute transformation based upon
68       GCPs and output error measurements.
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70       If coordinates are given with the input file option or fed from  stdin,
71       both  the  input  and  the output format is "x y z" with one coordinate
72       pair per line. Reverse transform is performed with the -r flag.
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74       The format option determines how control points  are  printed  out.   A
75       summary  on  the  control  points can be printed with the -s flag.  The
76       summary includes maximum deviation observed when transforming GCPs  and
77       overall  RMS.  The  format option is ignored when coordinates are given
78       with the input file option.
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NOTES

81       Ortho-transformation is a 2-step transformation. First, source  coordi‐
82       nates  are  transformed  to sensor coordinates, then sensor coordinates
83       are transformed to target coordinates.
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SEE ALSO

86       i.rectify
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TODO

89       Update this document with x,y,z<->E,N,H information
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AUTHORS

92       Brian J. Buckley
93       Glynn Clements
94       Hamish Bowman
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SOURCE CODE

97       Available at: i.ortho.transform source code (history)
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99       Accessed: Mon Jun 20 16:47:38 2022
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101       Main index | Imagery index | Topics index | Keywords index |  Graphical
102       index | Full index
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104       © 2003-2022 GRASS Development Team, GRASS GIS 8.2.0 Reference Manual
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108GRASS 8.2.0                                               i.ortho.transform(1)