[Q] About v.in.dxf

[Adalberto da Silva]

Hello, Choi,

	If I do understand your mail you have a dxf file with some information
like topographic contours, rivers & streams and things alike.

	I got a similar problem to import elevation information from dxf files
because I had several digitised maps in Autocad R12 vector format that I
exported to dxf to interchange information (as the name itself means...)
With v.in.dxf I've only obtained the polylines and points of my original
file with *no* elevation data attached - and this was not exactly what I
wanted to generate a DEM.

	I found two solutions but I wish not as good as one may want.

	First: I tested a demo version of Grassland (its timelife span is a
mere 30 days period) and its v.in.dxf3d works fine. But you must pay for
this and, the worst, it runs under Win95...

	Second: I made a dirty & snail-pacer Matlab routine that reads the
ascii dxf file and extracts a site list (easting, northing, elevation)
of all polyline vertexes and points I got digtised. It's not an elegant
solution but it works if you need only this site list.

	If this Matlab routine can make any job for you, I can mail it for you.

	But I think this can be better: do you have better programming skills
than me in order we can write a tiny utility to do this job?

	Is there anybody here who can help? I'm not a programmer but it does
not seem to be a very, very difficult task. At least, as starting point
I made that simple Matlab routine and I think the dxf file format is not
so difficult to read (to say the truth, it's quite verbose and explicit
for one who wants to collect data from it).	

	Best regards,


	Adalberto da Silva
	Instituto Astronomico e Geofisico
	Universidade de Sao Paulo - Brasil
	adalbert at iag.usp.br


Sung-Won Choi wrote:
> 
> Hi!
> I have a dxf map in AutoCad...
> And I'd like to import this map to Grass 4.1
> But I don't know.
> 
> I need a vector file and a attribute file of that.
> 
> When I used a v.in.dxf, Vector file was imported but Attribute file wasn't.
> 
> Please Help me!
> 
> Thank you.

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