rescale_measures: Rescale reachcode measure to comid flowline measure
Description
Given a reachcode measure and the from and to measure for a
comid flowline, returns the measure along the comid flowline. This is
a utility specific to the NHDPlus data model where many comid flowlines make
up a single reachcode / reach. "Measures" are typically referenced to
reaches. Flowlines have a stated from-measure / to-measure. In some cases
it is useful to rescale the measure such that it is relative only to the
flowline.
from is downstream -- 0 is the outlet
to is upstream -- 100 is the inlet
Usage
rescale_measures(measure, from, to)
Value
numeric rescaled measure
Arguments
measure
numeric reach measure between 0 and 100
from
numeric flowline from-measure relative to the reach