sample_streams: sample_streams
In crumplecup/riparian: Analyzing the Extent of Riparian Cover

Generates 'n' samples along 'prc', finds the closest points on 'strms' to each point along 'prc', returns 'n' samples along 'strms'.

sample_streams(
  n = 100,
  lots = prc_mtls,
  prc = prc_per,
  strms = prc_strms,
  buff = per_buff,
  width = 50,
  span = 75,
  inc = 6,
  steps = 25,
  thresh = 50
)

`n`	is the number of samples to take
`lots`	is a polygon object representing sample extent
`prc`	is the line path for perennial and fish-bearing streams in RR (NHD)
`strms`	is the hydro-enforced drainage layer in RR (WSI)