Hi all,
wish
GRASS can import DXF with inscribed text in polygons becoming its attributes.
It will save a lot of bother… Details in mails below.
Thanking the untiring programming team in anticipation
Ravi
On Thu, Jun 09, 2005 at 10:33:26PM -0700, RAVI KUMAR wrote:
Hi,
the import of DXF is not a problem and we have been doing it.
It is a WISH THAT
- If the TEXT inside a polygon automatically becomes it’s attribute
after import into GRASS!!\
It would save a lot of time.
May be the developers of GRASS may kindly consider this aspect… in
the next GRASS CVS release…
Ravi
Markus Neteler <neteler@itc.it> wrote:
I have tested the map with GRASS 6 (not knowing the
coordinate system):v.in.dwg Geology.dxf out=geologydxf
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
&g! t; MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
MTEXT entity not supported
3555 elements processed
Building topology …
3538 primitives registered
Building areas: 100%
0 areas built
0 isles built
Attaching islands:
Attaching centroids: 100%
Topology was built.
Number of nodes : 2581
Number of primitives: 3538
Number of points : 16
Number of lines : 3522
Number of boundaries: 0
Number of centroids : 0
Number of areas : 0
Number of isles : 0The database contains now:
v.db.select geologydxf
cat|entity_nam|color|weight|layer|block|txt
1|POINT|256|-1|TICS||
2|POINT|256|-1|TICS||
3|POINT|256|-1|TICS||
4|POINT|256|-1|TICS||
5|POINT|256|-1|TICS||
6|POINT|256|-1|TICS||
7|POINT|256|-1|TICS||
8|POINT|256|-1|TICS||
9|POINT|256|-1|TICS||
10|POINT|256|-1|TICS||
11|POINT|256|-1|TICS||
12|POINT|256|-1|TICS||
13|POINT|256|-1|TICS||
14|POINT|256|-1|TICS||
15|POINT|256|-1|TICS||
16|POINT|256|-1|TICS||
17|LINE|256|-1|GELI236||
18|LINE|256|-1|GELI236||
19|LINE|256|-1|GELI236||
20|LINE|256|-1|GELI236||
21|LINE|256|-1|GELI236||
22|LINE|256|-1|GELI236||
23|LINE|256|-1|GELI236||
24|LINE|256|-1|GELI236||
…
3536|LINE|256|-1|GELI236||
3537|LINE|256|-1|GELI236||
3538|LINE|256|-1|GELI236||I don’t know if this is what you expecte! d but to some extent
you can import the DXF file.Regards
Markus Neteler
On Thu, Jun 09, 2005 at 05:57:04AM -0700, RAVI KUMAR wrote:
Hi,
Iam attaching a small 1:50000 scale geological map,
which is scanned and vectorised manually by a
draftsman.When this is imported into ARC-INFO, the inscribed
text in each Geological polygon becomes its attribute.This is a very quick method,
- where all the digitization is done by the not so
computer savvy draftsmen- Then the Geologist imports it into ARC-INFO to
convert into a digital data with a vital link
attribute.- The geologist then attaches an external database
table using this link attribute.If U can make such a thing possible in grass, then we
can use OGLed Qcad on linux, for the draftsmen and
GRASS for the Geologists.
Ravi— Markus Neteler wrote:
Hi Ravi,
could you send (offlist) a small DXF sample file to
me?
Then I can check for the attributes in v.in.dwg.Markus
On Wed, Jun 08, 2005 at 04:56:51AM -0700, RAVI KUMAR
wrote:Hi All,
recently we completed a Geological digital dataset
in
ARC-INFO.
The steps in short are
- SCAN the map into and image
- Draw polygons of various geological units with
the
image of the map in the backgrou! nd (using Autocad)- The polygons of individual units have an
inscribed
text indicating the geology and save as a DXF file- Import the resultant DXF file into ARC-INFO.
- ARC-INFO automaticall takes the inscribed text
in
each polygon as an attribute for that polygon.Using DXF import software GRASS is able to get all
the
vectors, but IF THE INSCRIBED TEXT OF EACH POLYGON
BECOMES AN ATTRIBUTE then it will be far simpler
to
make a GRASS dataset.WHY USE AUTOCAD AND WHY NOT DO THE ENTIRE THING IN
GRASS??FOSS software ‘Qcad’, can be used instead of
AUTOCAD,
and the CAD Draftsmen with limited knowledge can
make
the vector of a geological map after scanning,
with
inscribed text in each geological unit represented
as
a polygon.If GRASS then can import the resultant DXF file
from
Qcad, and make the inscribed text as its
attribute, it
can speedup the process of making digital
datasets.Hope the GRASS program builders can give a
solution,
like this.Thanking in anticipation
Ravi
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