how to model terrain using DRAW


I am a new user of OpenCASCADE. I am trying to generate a 3D surface to model the topography of an area.

I am using the "surfapp" within the test harness DRAW to generate the surface in the following:

surfapp s 186 120 \
x1 y1 z1 \
x2 y2 z2 \
xN yN zN

The (x,y,z) triplets contain the elevation data at 22,320 locations. The "surfapp" command finished without giving any error information. But it hangs when I try to view the generated surface using "view 0 AXON".

My question is

1. is there a better way to generate terrain geometry using opencascade?

2. how should I display the generated terrain geometry?

Thanks in advance for any help on this problem.

Best regards,
Po Chen

none's picture

Hi Po,

did you find a solution to this?
I am also interested in importing digital elevation models (DEM) into OpenCascade.
The format in three columns x, y, z would be exactly, what I have.

So, if you found a solution for this, I would be very interested in this.

Thanks and greetings from Switzerland,

Forum supervisor's picture

Dear all,

Please pay your attention to our advanced component called "Surface from Scattered Points". You may read more information about this component on our web page at .

Best regards,
Forum supervisor