man gdal_merge.py (Commandes) - mosaics a set of images

NAME

gdal_merge.py - mosaics a set of images

SYNOPSIS

gdal_merge.py [-o out_filename] [-of out_format] [-co NAME=VALUE]*
                     [-ps pixelsize_x pixelsize_y] [-separate] [-v] [-pct]
                     [-ul_lr ulx uly lrx lry] [-n nodata_value] [-init value]
                     [-seperate] input_files

DESCRIPTION

This utility will automatically mosaic a set of images. All the images must be in the same coordinate system and have a matching number of bands, but they may be overlapping, and at different resolutions.

-o out_filename:
The name of the output file to be created.
-of format:
Output format, defaults to GeoTIFF (GTiff).
-co NAME=VALUE:
Creation option for output file. Multiple options can be specified.
-ps pixelsize_x pixelsize_y:
Pixel size to be used for the output file. If not specified the resolution of the first input file will be used.
-ul_lr ulx uly lrx lry:
The extents of the output file. If not specified the aggregate extents of all input files will be used.
-v:
Generate verbose output of mosaicing operations as they are done.
-separate:
Place each input file into a separate stacked band.
-pct:
Grab a pseudocolor table from the first input image, and use it for the output. Merging pseudocolored images this way assumes that all input files use the same color table.
-n nodata_value:
Ignore pixels from files being merged in with this pixel value.
-init value:
Pre-initialize the output file with this value. However, it is not marked as the nodata value in the output file.

NOTE: gdal_merge.py is a Python script, and will only work if GDAL was built with Python support.

AUTHORS

Frank Warmerdam <warmerdam@pobox.com> Silke Reimer <silke@intevation.de>