Hydroshed

Gets aggregated boundary of all hydroshed polygons upstream of the provided location.

hydroshed(
  x,
  y,
  srid = 4326,
  bbox = NULL,
  properties = NULL,
  transform = NULL,
  epsg = 4326,
  nocache = getOption("fwa.nocache", FALSE)
)

Arguments

x

A number of the x coordinate.

y

A number of the y coordinate.

srid

A positive whole number of the epsg of the coordinates.

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.

See also

API documentation

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

Examples

hydroshed(x = -132.26, y = 53.36)
#> Simple feature collection with 1 feature and 0 fields
#> Geometry type: POLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -132.384 ymin: 53.25479 xmax: -132.1535 ymax: 53.38813
#> Geodetic CRS:  WGS 84
#> # A data frame: 1 × 1
#>                                                                         geometry
#> *                                                                  <POLYGON [°]>
#> 1 ((-132.275 53.38333, -132.2601 53.38369, -132.2566 53.38715, -132.2542 53.387…