i.ortho.corr - GRASS GIS manual

Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.

NAME

i.ortho.corr - Corrects orthophoto taking part of the adjacent orthophotos using a camera angle map.

KEYWORDS

imagery, orthorectification

SYNOPSIS

i.ortho.corr

i.ortho.corr --help

i.ortho.corr input=name [osuffix=ortho] [csuffix=ortho] tiles=name [field=name] [exclude=name] [output=name] [--help] [--verbose] [--quiet] [--ui]

Flags:

--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=name [required]: Name of input raster map
osuffix=ortho: Suffix of ortophoto map, default is .ortho, use None for no suffix
csuffix=ortho: Suffix of camera angle map, default is .camera_angle, use None for no suffix
tiles=name [required]: Name of input vector tiles map create by a list of orthophoto
field=name: Name of location's field in the input vector tiles map
exclude=name: Pattern to use if you want exclude some tiles
output=name: Name of output raster map

DESCRIPTION
NOTES
EXAMPLES
SEE ALSO
AUTHOR

DESCRIPTION

i.ortho.corr allows to correct orthophotos using the camera angle map create by i.ortho.photo.

It creates a new image by searching further images adjacent to the input image. The output contains part of near images where the camera angle value is optimal.

NOTES

It requires a tile index to be created containing all the images to be processed (e.g., GDAL's gdaltindex can create that):

gdaltindex tile.shp $GRASSDATA/$LOCATION/$MAPSET/cellhd/*imagery.ortho

The field option is used for the field's name which contains the path to the file, the default is location that it is used by gdaltindex. The exclude option serves to remove some tiles, for example when having tiles from a different flight, they can be excluded by passing a string or a regular expression.

EXAMPLES

Create tile index:

gdaltindex tile.shp $GRASSDATA/$LOCATION/$MAPSET/cellhd/*imagery.ortho

Import tile index inside the mapset

v.in.ogr dns=tile.shp out=tile_images

Start i.ortho.corr with the default parameters, the output map's name will be image.ortho_corr. You can use default parameters if you didn't change the output prefix in i.ortho.photo:

i.ortho.corr input=image.ortho tiles=tile_images

Start i.ortho.corr with different parameters

i.ortho.corr input=image.photo tiles=tile_images osuffix=.photo csuffix=.camera

AUTHOR

Luca Delucchi, Fondazione E. Mach (Italy)

SOURCE CODE

Available at: i.ortho.corr source code (history)

Latest change: Monday Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55