Mark,thanks! inorder to get the right working unit, the referenced terrain file is enlarged to 1000 times the size of original. I have checked, this is the point!
but for "Analyze Volume" tool, it is better to use working unit of the master file rather than the working unit of the referenced file when calculation occuring.
but for "Analyze Volume" tool, it is better to use working unit of the master file rather than the working unit of the referenced file when calculation occuring.