Area tool

Button

Use

Click several points to obtain an area (closed path).

Double-click the last point (point 7 in the example) to close the path.

Tips

To undo a mouse click, press the Esc key.

"Lasso" function: when using the path or area tools, the program will "sample" points when you press the Ctrl key whilst moving the mouse.

While you are moving the mouse to the next position, lengths and angles are displayed in the status bar at the bottom of the Digimizer window.

Measurements

The surface area, perimeter, length, width, roundness and average intensity are displayed in the Measurements list window (*).

Roundness is defined by (4*PI*Area) / (Perimeter*Perimeter) and is a number between 0 and 1. Values closer to 1 indicate a more 'round' object. A circle has a roundness of 1.

When the option Show result after finalizing measurement is selected, then the area and perimeter are displayed in a small window next to the object.

Summary statistics for all areas, perimeters, lengths, widths and average intensities measured with the Area tool are displayed in the Statistics window.

*Only the parameters selected in the Measurements List Columns options box are displayed in the Measurements list window.

See also

Measurement tools