Add Blue Line Key to Longitude and Latitude — fwa_add_blk_to_lon

Adds integer blue line key (blk) and numeric river meter (rm) column and sfc point (geometry) column of the closest point on the stream network (by default within 5 km) to the point specified by the lon and lat (WGS84).

fwa_add_blk_to_lon_lat(
  x,
  tolerance = 5000,
  limit = 1,
  epsg = getOption("fwa.epsg", 3005),
  nocache = getOption("fwa.nocache", FALSE)
)

Arguments

x: A data frame with numeric longitude (long) and latitude (lat) columns.
tolerance: A number of the tolerance in m.
limit: A positive whole number indicating the maximum number of features to return.
epsg: A positive whole number of the EPSG projection for the geometry.
nocache: A flag specifying whether or not to cache results.

Value

An sf tibble with the columns of x plus integer column blk, real columns rm and distance_to_lon_lat and sfc point column geometry

Details

If a match isn't found the row is dropped.

Examples

if (FALSE) {
fwa_add_blk_to_lon_lat(data.frame(lon = -132.26, lat = 53.36))
}