Download GRASS Reference Manual Vector Commands

precedence is given to lines, the user should be aware that any lines that bound unlabeled areas in the
DLG-3 file will be stored as line data.
Any unlabeled areas would therefore be lost (this is only a concern when areas are unlabeled; labeled area
information will be retained). If precedence is given to areas, lines will be stored as boundaries to areas
that are unlabeled.
Building support files with v.support: When you run v.support you will have the option of snapping the
nodes in your vector file that fall within a certain threshold of one another. WARNING: the default
threshold is calculated using the scale of the original DLG-3 file. If the threshold is too high, excessive
snapping may occur, destroying the file!! With v.support, the user has the option of snapping or not
snapping nodes, and further, of setting a particular snapping threshold.
AUTHORS
Dave Gerdes, U.S. Army Construction Engineering Research Laboratory
Irina Kosinovsky, U.S. Army Construction Engineering Research Laboratory
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