Using this app, you can draft the Drainage System professionally, using the two systems - Inch and Metric. In metric, two scales are provided, 1.0 and 1000.0.The 1.0 scale means 1.0 unit is equal to one meter in the drawing and the 1.000.0 scale means 1000.0 unit is equal to one meter. You can choose which one you prefer as per your drawing settings / units.