The following methods can be used to set a route's measure values. It is possible to apply these methods to an entire route or a portion of a route.
Set As Distance
Set the route's measure values to be the cumulative length from the origin of the geometry. Hence, route measures will increase with the digitized direction of the route.
Set the route's measures using known start and end values. All measure values between the start and end will be interpolated.
In some applications, the ratio between a route's length and its measures is not constant. When the Set From/To method is applied to a route, it is possible to preserve the measure schema that exists. That is, this method can assign measure values based on the original measure value.
Sometimes a constant change needs to be applied to a route's measures. This is the case whenever measures need to be rescaled or converted into different units or increased or decreased by some value. You can meet these needs by using the Apply Factor and Offset methods.
Multiply a route's measures by a factor.
Add a value to a route's measures.
Interpolate or extrapolate all route measures that are unknown (NaN).
Set all route measures to NaN.
Set Direction As M
There is no requirement that a route's measures increase with the digitized direction. This method will flip a route's geometry to match the direction in which the measures are increasing.