i.ortho.transform(1grass) GRASS GIS User's Manual i.ortho.transform(1grass)
NAME
i.ortho.transform - Computes a coordinate transformation based on the
control points.
KEYWORDS
imagery, orthorectify, transformation, GCP
SYNOPSIS
i.ortho.transform
i.ortho.transform --help
i.ortho.transform [-srxp] group=name [format=string[,string,...]]
[coords=name] [--help] [--verbose] [--quiet] [--ui]
Flags:
-s
Display summary information
-r
Reverse transform of coords file or coeff. dump
Target east,north,height coordinates to local x,y,z
-x
Display transform matrix coefficients
-p
Enable panorama camera correction
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
group=name [required]
Name of input imagery group
format=string[,string,...]
Output format
Options: idx, src, dst, fwd, rev, fxy, rxy, fd, rd
Default: fd,rd
idx: point index
src: source coordinates
dst: destination coordinates
fwd: forward coordinates (destination)
rev: reverse coordinates (source)
fxy: forward coordinates difference (destination)
rxy: reverse coordinates difference (source)
fd: forward error (destination)
rd: reverse error (source)
coords=name
File containing coordinates to transform ("-" to read from stdin)
Local x,y,z coordinates to target east,north,height
DESCRIPTION
i.ortho.transform is an utility to compute transformation based upon
GCPs and output error measurements.
If coordinates are given with the input file option or fed from stdin,
both the input and the output format is "x y z" with one coordinate
pair per line. Reverse transform is performed with the -r flag.
The format option determines how control points are printed out. A
summary on the control points can be printed with the -s flag. The
summary includes maximum deviation observed when transforming GCPs and
overall RMS. The format option is ignored when coordinates are given
with the input file option.
NOTES
Ortho-transformation is a 2-step transformation. First, source coordi-
nates are transformed to sensor coordinates, then sensor coordinates
are transformed to target coordinates.
SEE ALSO
i.rectify
TODO
Update this document with x,y,z<->E,N,H information
AUTHORS
Brian J. Buckley
Glynn Clements
Hamish Bowman
SOURCE CODE
Available at: i.ortho.transform source code (history)
Accessed: unknown
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GRASS 7.8.7 i.ortho.transform(1grass)
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