Thanks a lot TIG !

Sorry, your right. Because im very bad in english i usualy say the less possible.

Windows 8.1
Sketchup 8 pro

install the plugin : just copy past the file "DivideByMaterial.rb" in C:\Program Files (x86)\Google\Google SketchUp 8\Plugins

"undefined method `file_loaded?' for main:Object"

It works great! Thank you very much to all three of you !

I tried with a selection of just a few point and same error, after explode and copy paste into another file, i have always the same error.

If you want you can download the file here:
http://www.sendspace.com/file/1khd78

Thanks a lot for your help. Actually i have an error "some object are not construction point".

Hello everyone,

I am looking for a way to model terrain from points level. I do know from contour lines, but not from points level.

Thank you for your help

You are perfectly right ! Thank you for your help, i owe you big time !

I didn't know that each component can have his own origin. I understand now wy "explode component" solve the problem.

I totally agree with you, I would have thought. Now the problem is that I have already worked a dozen hours about this file, and I prefer not having to reimport the file and start over.

The scale of the textures is not dramatic, I can manually multiply by 100 the scale of each texture. But what bothers me most is the display bug.

I import a dwg file.
The imported model is 100 times too big, I've reduced by a factor of 100 with the scale tool.
Now i have two problem:

1. Texture map the model with a factor of 100. It's weird, when I measure the height of a wall it is well 2m70. But that applies to texture correctly I must give a height of 270m ....

2. At the display I have a bug that when I zoom a little over an area the elements gradually disappear as I approach. It is a known bug that I already had with other models, but I can not remember how I do to solve it.

Thank you very much for your help,