i.ortho.transform(1grass)

1i.ortho.transform(1)          Grass 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   [-srx]   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       --help
30           Print usage summary
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32       --verbose
33           Verbose module output
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35       --quiet
36           Quiet module output
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38       --ui
39           Force launching GUI dialog
40
41   Parameters:
42       group=name [required]
43           Name of input imagery group
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45       format=string[,string,...]
46           Output format
47           Options: idx, src, dst, fwd, rev, fxy, rxy, fd, rd
48           Default: fd,rd
49           idx: point index
50           src: source coordinates
51           dst: destination coordinates
52           fwd: forward coordinates (destination)
53           rev: reverse coordinates (source)
54           fxy: forward coordinates difference (destination)
55           rxy: reverse coordinates difference (source)
56           fd: forward error (destination)
57           rd: reverse error (source)
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59       coords=name
60           File containing coordinates to transform ("-" to read from stdin)
61           Local x,y,z coordinates to target east,north,height
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DESCRIPTION

64       i.ortho.transform  is  an  utility to compute transformation based upon
65       GCPs and output error measurements.
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NOTES

68       For coordinates given with the coords file option or  fed  from  stdin,
69       the input format is "x y z" with one coordinate pair per line.
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71       The transformations are:
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73       order=1:
74           e = [E0 E1][1].[1]
75               [E2  0][e] [n]
76           n = [N0 N1][1].[1]
77               [N2  0][e] [n]
78       order=2:
79           e = [E0 E1 E3][1 ] [1 ]
80               [E2 E4  0][e ].[n ]
81               [E5  0  0][e²] [n²]
82           n = [N0 N1 N3][1 ] [1 ]
83               [N2 N4  0][e ].[n ]
84               [N5  0  0][e²] [n²]
85       order=3:
86           e = [E0 E1 E3 E6][1 ] [1 ]
87               [E2 E4 E7  0][e ].[n ]
88               [E5 E8  0  0][e²] [n²]
89               [E9  0  0  0][e³] [n³]
90           n = [N0 N1 N3 N6][1 ] [1 ]
91               [N2 N4 N7  0][e ].[n ]
92               [N5 N8  0  0][e²] [n²]
93               [N9  0  0  0][e³] [n³]
94       ["." = dot-product, (AE).N = N’EA.]
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96       In  other words, order=1 and order=2 are equivalent to order=3 with the
97       higher coefficients equal to zero.
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TODO

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

106       Brian J. Buckley
107       Glynn Clements
108       Hamish Bowman
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110       Last changed: $Date: 2017-04-07 18:41:10 +0200 (Fri, 07 Apr 2017) $
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SOURCE CODE

113       Available at: i.ortho.transform source code (history)
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115       Main index | Imagery index | Topics index | Keywords index |  Graphical
116       index | Full index
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118       © 2003-2019 GRASS Development Team, GRASS GIS 7.4.4 Reference Manual
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122GRASS 7.4.4                                               i.ortho.transform(1)