NAME
gdal_merge - 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]
[-ot datatype] [-createonly] 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, which will be created if it does not
already exist (defaults to ’out.tif’).
-of format:
Output format, defaults to GeoTIFF (GTiff).
-co NAME=VALUE:
Creation option for output file. Multiple options can be specified.
-ot datatype:
Force the output image bands to have a specific type. Use type
names (ie. Byte, Int16,...)
-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.
-createonly:
The output file is created (and potentially pre-initialized) but no
input image data is copied into it.
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>