How do make a 3d model of this?

LARV

Hello pros,

I found this NASA site where I can download topography images. I´ve seen these black and white images before and I heard they can be (or are ment to be) used to create 3d topography models. The problem is that I don´t know how to do that, once I have the images. Can someone help me out?

http://visibleearth.nasa.gov/view.php?id=73934

pilou

Maybe Bitmap to Mesh by Thomthom if you want stay inside Sketchup but reduce the size first!

Rich O Brien

You need to displace a subdivided mesh so the image can act as the displacement map to raise and lower the mesh.

Here's an example with only a single area acting as a displacement map. The mesh is at 0.7million vertices to get anything reasonable for presenting.

I would think using this technique on the full resolution would require you traveling to CERN and making use of the Hadron Collider to run SU.

massimo

@rich o brien said:

I would think using this technique on the full resolution would require you traveling to CERN and making use of the Hadron Collider to run SU.

:laughing:  :laughing:  :laughing:

Rich O Brien

In SU it becomes unusable at 0.5million vertices.

Rich O Brien

Actually when I saved the file as a .skp it was 64mb in size.

I imagine the full file would run into gigabytes.

pilou

@ Rich : With what have you made your displacement Map?

Rich O Brien

I used Blender....

http://cloud.sketchucation.com/public.php?service=files%26amp;t=5de80756729b909a39ac637b6830622b

...feel free to examine the file

baz

@rich o brien said:

You need to displace a subdivided mesh so the image can act as the displacement map to raise and lower the mesh.

I love it when you talk dirty.

Rich O Brien

I should start charging

LARV

@rich o brien said:

You need to displace a subdivided mesh so the image can act as the displacement map to raise and lower the mesh.

[attachment=0:zbh5bvyq]2015-10-27_10-38-33.png[/attachment:zbh5bvyq]

Here's an example with only a single area acting as a displacement map. The mesh is at 0.7 million vertices to get anything reasonable for presenting.

I would think using this technique on the full resolution would require you traveling to CERN and making use of the Hadron Collider to run SU.

I have an Alienware computer, I got this.

Frederik

@rich o brien said:

I would think using this technique on the full resolution would require you traveling to CERN and making use of the Hadron Collider to run SU.

Do you have access to it...??

Rich O Brien

@frederik said:

Do you have access to it...??

Yes....you can find out what's possible here

JQL

...