The Perimeter function calculates the perimeter of a geography, in specified units.
Perimeter(units, polygon)The function arguments are:
units
Required
The unit of measurement for the perimeterValid values are "kilometers", "meters", and "miles".
polygon
Required The object for which we calculate the perimeter Must be in valid Geography polygon format.
The Perimeter function returns the following values for the Coordinates column values that define a polygon, when specifying area in meters, kilometers, or miles:
Perimeter("meters", [Coordinates])Perimeter("kilometers", [Coordinates])Perimeter("miles", [Coordinates])