The program will be run non-interactively if the user specifies the parameter value and (optionally) sets the -h flag on the command line, using the form:
If the user instead simply types v.stats without specifying program arguments on the command line, the program will prompt the user to enter inputs through the standard user interface described in the manual entry for parser.
The GRASS version number is given. Parenthetical text following this describes the read access level available and notes whether or not the file is in GRASS version 4.0 portable data format. The access level indicates the types of data available for the named vector map layer. "Level 1" denotes a binary vector file (without any accompanying dig_plus file), while "Level 2" denotes the existence of a dig_plus (vector topology) file for the named map layer (generally created by v.support). If only Level 1 information is available for a vector map layer, only the number of lines and (optionally) the file header will be printed to standard output.
If all areas and islands (isles) in the vector file have been identified (usually by v.support), their counts will be followed by "complete." If not, they will be followed by "incomplete". The dig_plus file, which is created and updated by v.support, must exist for this information to be output.
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