Sometimes it's trial and error to place objects on the landscape, and it takes a lot of time.
I don't know if there is a utility out there to aid in the placement of your objects ... So I made one.
It's free to anyone to use but there is no guarentee .... and it doesn't as yet have a help file ... not hard to understand though .... it works for me.
Download it from my site @
I called it FMSXYZ
Though it doesn't as yet have the option of giving you the height position, it will give you a X and Z position (Y being the height) with point and click ease.
It is a small utility but since it is written in Visual Basic the support files are large ... the whole package zipped is about 1500KB.
I hope this helps some others out there who might have had the same frustration.