| GIS@Grinnell
: Training
Calculating the Perimeter of a Polygon
Feature
- Open the attribute table of the layer you want add perimeter
values to.
- Right-click the field heading for perimeter (if there
is no field holding perimeter values you can add a new field
for perimeter by clicking the options button and selecting
the new field option).
- Click Calculate Values.
- Check Advanced.
- Type or paste the following VBA statement in the first
text box.
- Dim dblPerimeter as double
- Dim pCurve as ICurve
- Set pCurve = [shape]
- dblPerimeter = pCurve.Length
- Type or paste the variable dblPerimeter in the text box
directly under the perimeter field name.
- Click OK.
- Tip: The property length returns a field type of double.
For best results, your length field should also be a double
field type.
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