dakis??at?Jan?25??96?07?34?40?pm@bnr.ca>
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Giorgos Zacharioudakis writes:
I have a strange silly problem:
I want to create a map with points which represent the
wells in my project area.
I digitised them as points using various codes and I saved the
resulting file as a .dxf file.The I used v.in.dxf.
The command seems to work correctly but then
1) either I do not get a new binary vector file (typing 'lists' in
v.support),
2)or after v.support I get a scrolling text with lines such as:
"Degenerate line (1), skipping. offset 819 (a pair of coordinates)"
At the very end I get:
Number of lines :0
Number of nodes :0
Number of areas:0
Number of isles:0
Number of atts:0
Number of unattached atts:0
Snapped lines:0.
3) If the .dxf contains both lines and points, everything is correct
apart from the fact that GRASS ignores the points and plotts (during
v.digit) ONLY the lines.
Am I missing something ?
Giorgos,
GRASS distinguishes between points (single coordinates) and lines (multiple
coordinates by expecting them to live in different directories and map
layers. Point coverages such as wells should go into the $LOCATION/site_lists
directory, or, if they have variables attached, into the RIM or other
database engine you use. Lines go into vector maps in the $LOCATION/dig*
directories, again with variables in RIM or other database.
Your error messages flag up the fact that you are trying to put points into
a vector map. Solution: either digitise points and lines separately, or edit
the DXF file to extract all points into a site_list.
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@bham.ac.uk |
URL http://www.bham.ac.uk/BUFAU/Staff/vanleupm.html__________________________|