This is a solution for points only not lines or polys - so if you want
to create a DEM this will work. Warning - very convoluted and inelegant
solution!
In AutoCAD set your "logfilemode" variable to "1"
and you logfilename variable to some name and path e.g.
"c:\temp\dem.log" From this point on all commands and output will be
written to that logfile.
Now select all you dem points and type "list". AutoCAD will list the
x,y and z of every item selected. Since you have to hit return for
every item you need to find some way to hold the return key down ( I use
a highlighter and a book on top. Now you should see all your items
scrolling by.
When AutoCAD has listed all of your items you now have a text file with
this list. Unfortunately the list is full of junk. At this point I
bring the list into ACCESS (other database programs will work.) Import
the list using the fixed width option and insert the columns separators
so that the x y and z go into separate fields and all of the other
fields can be dropped. If you define the fields as a numeric data
type, all of the junk will get turned into zeroes. Now you can filter
out all the zeroes. Export this table to a text file which can be opened
in MapInfo or I suppose you could use ODBC to get this table into
MapInfo.
Once this table is in MapInfo you can create point based on the X and y
columns and you have the Z .
Some of you now think I am completely insane but it works,
Andrew Waltho wrote:
>
> Is anyone aware of a way to import a 3D DXF file to Mapinfo in a way that
> preserves the elevation data? The import options in MI 4.5 seem to strip
> any elevation data from the file.
>
> Thanks,
>
> Mining & Resource Technology
> Andrew Waltho
> Principal Geologist
>
> Brisbane Office
> Tel: +61 7 3229 1633
> Fax: +61 7 3229 6120
>
> www.mrtconsulting.com.au
>
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