Freshwater Atlas Watershed Stream

Gets the upstream stream segment within the fundamental watershed.

fwa_watershed_stream(
  blue_line_key,
  downstream_route_measure = 0,
  bbox = NULL,
  properties = NULL,
  transform = NULL,
  epsg = 4326,
  nocache = getOption("fwa.nocache", FALSE)
)

Arguments

blue_line_key

A positive whole number of the stream blue line key.

downstream_route_measure

A positive number of the river metre.

bbox

A vector of four numbers indicating bounding box to limit output features to, e.g. c(minLon, minLat, maxLon, maxLat).

properties

A vector of strings of the column names to include. If NULL (default), all columns are retained.

transform

A character vector with the name of the valid transform function followed by the parameter values (e.g. c("ST_Simplify", 100))

epsg

A positive whole number of the epsg to transform features to.

nocache

A flag specifying whether or not to cache results.

Value

An sf object.

Details

This is useful for adding stream network that was not included in the watershed at measure.

See also

API documentation

Other functions: fwa_index_point(), fwa_locate_along(), fwa_locate_along_interval(), fwa_watershed_at_measure(), fwa_watershed_hex(), hydroshed()

Examples

fwa_watershed_stream(356308001, downstream_route_measure = 10000)
#> Simple feature collection with 1 feature and 1 field
#> Geometry type: MULTILINESTRING
#> Dimension:     XY
#> Bounding box:  xmin: -121.9504 ymin: 49.1401 xmax: -121.9413 ymax: 49.15144
#> Geodetic CRS:  WGS 84
#> # A data frame: 1 × 2
#>   linear_feature_id                                                     geometry
#> *             <int>                                        <MULTILINESTRING [°]>
#> 1         700730811 ((-121.9504 49.15144, -121.9501 49.15144, -121.9498 49.1513…