ArcInfo2Grass, follow up

[Grass package]

y?31??95?01?52?05?pm at bnr.ca>
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organization: University of Illinois at Urbana
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originator: daemon at ux1.cso.uiuc.edu


Dear all,

I've done some checking with regard to my own question about moving vector
maps to ArcInfo, and with the help of Olga Waupotitsch I found that there
actually is no problem at all with v.out.arc except for some confusing
terminology in its man pages and in ArcInfo's Generate man page. What we 
found was that although v.out.arc offers options to export either lines or
polygons, the files it produces (named *.lin or *.pol) are actually identical.
So there is no difference between a .pol and a .lin file. The manual doesn't
mention this. When such a file is imported into ArcInfo using GENERATE, the
user is again offered two options, one to import LINES the other POLYGONS.
However, the POLYGONS option does not accept .pol files coming from Grass
since it expects a format specifying ISLAND (ie fully formed) polygons. The
user should therefore always use the LINES option in GENERATE.

Martijn

P. Martijn van Leusen -------------------------------------------------------+
Leverhulme Research Fellow, The Wroxeter Hinterland Project                  |
University of Birmingham Field Archaeology Unit                              |
Edgbaston, Birmingham B15 2TT                                                |
Phone +44 121 414 5513  Fax +44 121 414 5516  E-mail P.M.van-Leusen at bham.ac.uk