lc_get_comid: Get Lake COMIDs

In USEPA/StreamCatTools: Tools to work with the StreamCat API within R and access the full suite of StreamCat and LakeCat metrics

Get Lake COMIDs

Description

Function to return NHDPlusV2 Waterbody COMIDS using either a dataframe with coordinates and a specified CRS or an sf object. The function generates a vector of NHDPlus Waterbody COMID values a user can then pass to lc_get_data function

Usage

lc_get_comid(
  dd = NULL,
  xcoord = NULL,
  ycoord = NULL,
  crsys = NULL,
  buffer = NULL
)

Arguments

dd	Name of data frame object. Can be a simple data frame with coordinate columns in a known CRS or an sf points data frame
xcoord	The x coordinate column if using a raw data frame
ycoord	The y coordinate column if using a raw data frame
crsys	The epsg code if using a raw data frame
buffer	The amount of buffer to use to extend search for a waterbody (simply passed to nhdplusTools::get_waterbodies)

Value

A new sf data frame with a populated 'COMID' column

Author(s)

Marc Weber

Examples

dd <- data.frame(x = c(-89.198,-114.125,-122.044),
y = c(45.502,47.877,43.730))

comids <- lc_get_comid(dd, xcoord='x',
                       ycoord='y', crsys=4269)

dd <- data.frame(x = c(-89.198,-114.125,-122.044),
y = c(45.502,47.877,43.730)) |> 
   sf::st_as_sf(coords = c('x', 'y'), crs = 4326)
   
comids <- lc_get_comid(dd)
 

USEPA/StreamCatTools documentation built on Feb. 23, 2025, 12:53 a.m.