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

NAME  KEYWORDS  SYNOPSIS  Flags:  Parameters:  DESCRIPTION  NOTES  SEE ALSO  TODO  AUTHORS  SOURCE CODE 

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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 coordinates 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)

Latest change: Friday Dec 27 01:53:45 2024 in commit: bd53b2448f13719ddb4f5b4d5cf373f8c259de0b

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