closest_lake_distance: Find the distance to the closest upstream lake, the number of...

In jsta/streamnet: Morphology Analysis of Stream Networks

Find the distance to the closest upstream lake, the number of upstream lakes, and the area of upstream lakes

Description

Find the distance to the closest upstream lake, the number of upstream lakes, and the area of upstream lakes

Usage

closest_lake_distance(lines, lakes, outlet, size_threshold = 4,
  map = FALSE)

Arguments

lines	sf lines object
lakes	sf polygon object
outlet	integer row index of outlet reach relative to lines
size_threshold	numeric size above which to consider as a lake
map	logical show a map output of the results?

Value

a list with the following elements:

• Closest lake distance

• Number of upstream lakes

• Upstream lake area

Examples

## Not run: 
library(nhdR)

data(nhd_sub_lines)
data(nhd_sub_lakes)

outlet_reach   <- terminal_reaches(network = nhd_sub_lines,
                                   approve_all_dl = TRUE)
outlet <- which(outlet_reach[['comid']] == nhd_sub_lines[['comid']])

closest_lake_distance(nhd_sub_lines, nhd_sub_lakes, outlet = outlet)

## End(Not run)

jsta/streamnet documentation built on July 9, 2022, 9:02 p.m.