Apps OpenGL ES strange artifacts

[skinhat]

I'm doing an Opengl ES app.

I'm getting strange artifacts when an object is close to the camera. For example:

http://skinhat.com/android/artifact.jpg

When I move slightly back it goes away:

http://skinhat.com/android/noartifact.jpg

Does anyone know what might be causing this? It happens when I run the app in the emulator and also when I install my app on my android phone.

 

[skinhat]

I found by scaling my models up by a factor of 10 the problem went away. Was working on 0.1 sort of scale but when went up to around 1 scale it seems to work better.