Hello Sungwon
The arc-node vector model used by GRASS (and Arc/INFO) does not want to
see "duplicate lines", i.e, two lines directly on top of each other.
Boundaries between polygons _should_ be shared, so you only want one line.
Hope that helps,
--
Malcolm D. Williamson - GIS Specialist E-mail: malcolm@cast.uark.edu
Center for Advanced Spatial Technologies Phone: (501) 575-6159
Ozark Rm. 12 Fax: (501) 575-5218
University of Arkansas
Fayetteville, AR 72701 Web: http://www.cast.uark.edu
On Mon, 26 Jan 1998, Sung-Won Choi wrote:
Hello!
I have some questions!for example, I have two polygons having a common boundary,
so I'm gonna digitizing them in Autocad R13.
As far as I know, I should digitize the common boundary twice to make
two polygons.Is it true?
If not, can I get two polygons by digitizing the common boundary just once?Thank you in advance!
Sungwon Choi