NAME
g.compare.md5 - Checks if two GRASS GIS maps are identical.
KEYWORDS
general,
map management,
list
SYNOPSIS
g.compare.md5
g.compare.md5 --help
g.compare.md5 [-gct] ainput=name binput=string type=datatype[,datatype,...] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -g
- Return output in shell script style (0 fail, 1 success)
- -c
- Does not consider the color table for raster
- -t
- Does not consider the topology for vector
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- ainput=name [required]
- Name of first map to check
- binput=string [required]
- Name of second map to check
- type=datatype[,datatype,...] [required]
- Data type(s)
- Options: rast, vector
- Default: rast
g.md5sum is a module that checks if two GRASS maps are identical.
It uses the MD5 cryptographic hash function. For vector map layers it
does not check if the attribute table(s) are identical, too.
North Carolina example, with elevation map:
# copy a raster map
g.copy raster=elevation,dem
# now check and return TRUE
g.md5sum ain=elevation bin=dem
# now change the color table
r.colors map=dem color=srtm
# check again and it should return FALSE
g.md5sum ain=elevation bin=dem
# but when adding the -c flag (ignore color table), TRUE is returned
g.md5sum -c ain=elevation bin=dem
Luca Delucchi, Fondazione Edmund Mach, Research and Innovation Centre,
Department of Biodiversity and Molecular Ecology,
GIS and Remote Sensing Unit, Italy
SOURCE CODE
Available at: g.compare.md5 source code (history)
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© 2003-2018
GRASS Development Team,
GRASS GIS 7.4.1svn Reference Manual