Vertical distance above or below the datum is called?
Vertical distance above or below the datum is called?
ڈیٹم کے اوپر یا نیچے عمودی فاصلے کو کہا جاتا ہے؟
Explanation
Measured from a reference level, usually mean sea level.
Above datum: positive elevation; below datum: negative elevation.
Used in surveying, mapping, and construction.