Problems with DXF output

[Erin Lynch]

I've been using Survex 1.1.12 to output DXF files for use in ArcGIS.

When I output them by right-clicking on the 3d file and selecting 
"Convert to DXF" (which calls cad3d.exe), everything is fine. Specifically,
N, E, and altitude coordinates are preserved, so a point fixed at 
which has these coordinates in aven:         786543.42, 3273184.28, 1078.41
and has the same coordinates in the DXF: 786543.42, 3273184.28, 1078.41


Looking at the top of the DXF file, I see the min and max values make sense:

$EXTMIN
10
778087.000000
20
3261366.000000
30
236.000000
9
$EXTMAX
10
794028.710000
20
3290501.000000
30
1585.000000
9 


If I output DXF using "Export as" in Aven, the N, E, and altitude coordinates 
are munged and their values seem to be relative to an arbitrary (0,0,0) point.
So a point which has these coordinates in aven: 786543.42, 3273184.28, 1078.41
Has these coordinates in the DXF:                            268.26,     -1529.49,   188.91

Looking at the top of the DXF file, I see that the minimum N, E, and altitude 
coordinates are all negative:


$EXTMIN

10

-8188.165000

20

-13347.765000

30

-653.500000

9

$EXTMAX

10

7753.545000

20

15787.235000

30

695.500000

9


Cheers,
Erin







       
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