In the expression Con("elevm" > 30, 1, 0), what does it return if "elevm" is greater than 30?

The expression Con("elevm" > 30, 1, 0) utilizes the conditional function Con, which evaluates a specified condition and returns different values based on whether that condition is true or false. In this case, the condition being evaluated is whether the variable "elevm" is greater than 30.

If "elevm" is indeed greater than 30, the condition evaluates to true, and the Con function will return the first value specified in the expression, which is 1. This straightforward logic is foundational in GIS applications that require conditional statements to analyze and process data.

For conditions not met, such as when "elevm" is less than or equal to 30, the function will return 0, which accounts for other potential answers. However, since the question specifically inquires about the scenario where "elevm" exceeds 30, the outcome is clearly defined as returning 1, affirming that the choice made is appropriate.