Table of Contents
EXPRESSION Field Type
Below are some examples of the EXPRESSION field type. For more about this and other field types see Field Properties.
Example 1:
Here is an example of an expression that calculates the volume of a pipe in gallons based on the pipes diameter in inches and length in feet. This expression assumes you have fields in your layer called "Diameter" and "GIS Length".
([GIS Length]*(([Diameter]/2)*([Diameter]/2)*3.1416)/144)*7.48
Example 2:
Expressions can also be used to generate useful text values. An expression like the one below could be used to generate a hyperlink to online SCADA information about your lift stations. Note how it uses a "Name" field from the layer to create a deep link to that specific lift station's web page.
"http://example.com/LiftStationData.asp?id=[Name]"