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grid surface simplification tools?

6 REPLIES 6
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Message 1 of 7
eladkcem
1428 Views, 6 Replies

grid surface simplification tools?

Has anybody found any grid surface simplication tools? I had hoped to use grid surfaces instead of TIN surfaces to reduce the number of pieces I have to break up a large DEM into... but I need a way to systematically simplify the grid surface...?

 

any suggestions?

 

thx.

 

-d

6 REPLIES 6
Message 2 of 7
Joe-Bouza
in reply to: eladkcem

I guess the simplify surface command in the Modify tab >> edit surface>> simplify surface is in adequate?

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People)

HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
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Note: Its all Resistentialism, so keep calm and carry on

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Message 3 of 7
eladkcem
in reply to: Joe-Bouza

It won't seem to let me use that on a grid surface. (only TIN surfaces)...

 

?

Message 4 of 7
bingeomatics
in reply to: eladkcem

I know roundabout way - creat a TIN surfaace by your grid file and then export your new TIN model to DEM file changing grid space. Is it satisfy you?

Binnat Khalilov
Message 5 of 7
eladkcem
in reply to: bingeomatics

Binnat,

 

Thanks, but the grid surface is too big (waaay to many points) for use as a TIN surface within AutoCAD..

 

I'm truly suprised there don't appear to be any ways to simplify a grid surface... surely the programming would be even easier than for a TIN?

 

-d

Message 6 of 7
bingeomatics
in reply to: eladkcem

eledcem, did you tried to use AutoCAD Map functions?

Binnat Khalilov
Message 7 of 7
eladkcem
in reply to: bingeomatics

I don't have the map functions unfortunately...

 

but as it turns out, there is a WAAY better way to do this sort of grid simplication... in ArcGIS.

 

Using the raster calculation tools, I've been able to take noisy LIDAR data and create smooth contours. The approach uses the standard deviation of the elevation values around a given point to determine if it is in a 'flat' area (and can be averaged) or in a 'steep area' and needs to be preserved.

 

All the same... AutoCAD should really consider adding this type of functionality to the basic surface modification tools...

 

-d

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