The AREA command lets you calculate the accumulated area of close polylines, ellipses and circles from the drawing in a way of successive pickups. It provides three modes of area calculation; namely, they are:

  • Entity Mode     Calculate the area of single entity only. This is the initial default mode. The total area will be reset by the next single entity pickup. This mode is reset by the sub-command option "E".
  • Add Mode     Add the area of the next single entity pickup to the total area. This mode is entered by the sub-command option "A".
  • Subtract Mode     Subtract the area of the next single entity pickup from the total area. This mode is entered by the sub-command option "S".

Once the AREA command is entered, it will prompt

Area -- Add/Subtract/<Entity>:

asking you to pick up the entity for the area calculation. Valid entities are polylines, circles and close ellipses. If the polyline is not closed, it will be taken as a close polyline made by adding an additional line joining its start point and end point. You may enter the sub-command option "A" and "S" to switch to the Add mode and Subtract mode, respectively. AREA will change the prompt to

Area -- Entity/Subtract/<Add Mode>:


Area -- Entity/Add/<Subtract Mode>:


Once a valid object is picked up, AREA will calculate the area result and report it in the command area in the form as

Area = xxx.xxx, Total Area = xxxx.xxx

and continue the prompt again, until you press space bar or <Ctrl/C> to terminate it.

Other type of area calculation

For complicated area formation, use BPOLY command to obtain the total area information.

Special Notes:

The AREA command is an external command provided by the TCL program file "AREA.TCL" or "AREA.TCA". Either file must be present in the COMMANDS sub-directory where the TwinCAD resides. If you can not issue AREA command, you may solve the problem by copying the "AREA.TCL" to the COMMANDS sub-directory.

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