No, but what's the reason why you want to do this?
I would think it would be obvious!
To experiment with what it would be like to have flatter terrain, and to see what it would be like to have harsher more steeper terrain.
Google earth has/had this function. I don't think it would work in Outerra without completely redoing the dataset. Lower your FOV and try again. High FOV flattens huge mountains to 2" tall lumps on your screen.
Yes, I've used it in Google Earth. It made contrasting mountain/valleys MUCH easier when I bumped up the scale.
Why would you have to redo the dataset? You would be keeping the same dataset just scaling the points. Mountains and hills would get flatter if you scaled it below 1.0, and higher if you went above 1.0, for example.
I hear what you're saying about FOV. I've experimented with different settings. But the contrast I'm looking for is much higher than simple FOV changes.
Anyway, just a thought. I've always believed that more options = more gameplay opportunities = more product longevity. I.e., if there are more knobs and dials to turn we'll be playing a lot longer.
Take care.