.TH Mdem.extract 2M GRASSmapdev
.SH NAME
Mdem.extract    - provides information about DEM elevation tape
.br
.I (Map Development Tool)
.SH SYNOPSIS
.B Mdem.extract [if=tapedev] of=file bs=blocksize
.SH DESCRIPTION
.I Mdem.extract
extracts the current user window from
.I tapedev
in blocks of
.I blocksize
bytes.  The program accepts input from /dev/rmt0 if omitted.  Results
are placed in
.I file.
.I Mdem.extract
will not complain if the input file does not cover the entire window.
The program assumes unlabelled tapes in ascii format with no header
or trailer files.
.SH SEE ALSO
Mdem.examine
.SH "AUTHOR"
Andrew Heekin, U.S. Construction Engineering Research Laboratory
