[GRASS-dev] Re: v.in.dxf: support for 3DFACE?

[Michael Barton]

I haven't kept up with v.in.dxf since initially testing it and cheering its
incorporation into GRASS 6. But I'll be needing it soon and some of my
colleagues are using it quite a bit.

Is there a way to maintain a dxf entity attribute as a cat/attribute for
areas? The object it to avoid going through the complication of converting
lines to boundaries, adding centroids, adding cats, and linking cats with
attributes.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton



> From: Huidae Cho <grass4u at gmail.com>
> Date: Tue, 6 Jun 2006 10:16:03 -0500
> To: Hamish <hamish_nospam at yahoo.com>
> Cc: grass5 <grass-dev at grass.itc.it>
> Subject: [GRASS-dev] Re: v.in.dxf: support for 3DFACE?
> 
> Hamish,
> 
> On Wed, Jun 07, 2006 at 02:23:22AM +1200, Hamish wrote:
>> Hi,
>> 
>> all excited to try out v.in.dxf :) but 3DFACE isn't implemented yet :(
>> 
>> I can convert the DXF to a polyline version, and import with the new -f
>> flag, but I need to run v.build before I can display it. After that I
> 
> I fixed this bug.
> 
>> can do g.region v=, display with d.vect, & display in NVIZ (3D vector).
>> 
>> Looking in v.info the x,y,z ranges are all 0,0.
>> Note the final x,y ranges are both negative. (?)
>> 
>> after import:
>>  |            N: 0.000         S: 0.000                      |
>>  |            E: 0.000         W: 0.000                      |
>>  |            B: 0.000         T: 0.000                      |
>> after v.build:
>>  |            N: -4816.565     S: -5951.313                  |
>>  |            E: -1943.884     W: -3092.723                  |
>>  |            B: -11.644        T: 54.011                    |
>> 
> 
> Well, I think usual coordinates in DXF are not geographic coordinates, but it
> depends on DXF files.
> 
>> ??
>> 
>> 
>> Also it exits with "No DXF layers found!" for the 3DFACE import.
>> This had me really puzzled as the layer does exist, it is just all
>> of unknown feature types. Could the error message be improved?
>> "... with data!"
>> "Layers found with no features"
>> "No features in layer"
>> ???
> 
> v.in.dxf does not count layers it cannot import.
> 
>> 
>> 
>> Any plans for 3DFACE support? The wireframe is good stuff, but just a
>> skeleton. :)
>> 
>>  http://www.autodesk.com/techpubs/autocad/acad2000/dxf/3dface_dxf_06.htm
>> 
>>  
>> http://freegis.org/cgi-bin/viewcvs.cgi/grass6/vector/v.in.dwg/entity.c?rev=HE
>> AD&content-type=text/vnd.viewcvs-markup
> 
> Could you send me a sample DXF for 3DFACE and its screenshot?
> 
> Thank you.
> Huidae Cho
> 
>