Question

What is a spatial reference unit? What is a spatial reference unit? @Computer Science

Answer 1

"A spatial reference describes where features are located in the real world. You define a spatial reference when creating a geodatabase feature dataset or stand-alone feature class. The spatial reference includes a coordinate system for x-, y-, and z-values as well as tolerance and resolution values for x-, y-, z-, and m-values."

Source: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//003n0000001v000000