Disappearing lines & contours when editing from negative elevations

[annw2]

We get files from other firms that have property lines with a vertex at big negative numbers. Modify the negative number to 0 & the line disappears.

The same thing happens with edit contour elevation from big negative to correct elevation. Contour poly line vanishes.

Anyone have any ideas?

[Anonymous]

If the lines have a linetype other than continuous. Set them to continuous
before changing the elevation. They may have played with the linetype so it
LOOKED right at the 3D slope.

Allen

wrote in message news:5104746@discussion.autodesk.com...
We get files from other firms that have property lines with a vertex at big
negative numbers. Modify the negative number to 0 & the line disappears.

The same thing happens with edit contour elevation from big negative to
correct elevation. Contour poly line vanishes.

Anyone have any ideas?

[Anonymous]

Are these "other firms" using Survcad by any chance?

I often have this problem with Survcad files. Running Flatten first seems
to help. Of course you have to re-elevate the contours then. Overall a
real PITA.

--
Doug K
LDT 2005, XP Pro 2002 sp2, P4 2.40GHz, 1 GB RAM, Dual 19" Dell LCD, NVIDIA
GeForce FX 5700LE, Left Handed Kensington Trackball, Happily Married
w/Children



wrote in message news:5104746@discussion.autodesk.com...
We get files from other firms that have property lines with a vertex at big
negative numbers. Modify the negative number to 0 & the line disappears.

The same thing happens with edit contour elevation from big negative to
correct elevation. Contour poly line vanishes.

Anyone have any ideas?