get_hydro_layer {wdnr.gis}

Retrieve WDNR's HYDRO spatial layer

Description

A function that can be used to retrieve WDNR's 24k Hydrography (HYDRO) layer. Either the"24K Hydrography Streams and Rivers" or the "24K Hydrography Lakes and Open Water" can be queried by setting 'layer_type' to 'lines' or 'polygons' respectively. A spatial query can be performed to limit the output of the function by supplying a county name, watershed code, watershed name, or custom sf polygon object. Use the 'watershed_lookup' to find valid watershed codes and names. WBIC's can also be provided in order to return features for specific waterbodies. The 'where' arguement can be used to run custom SQL queries.

Usage

get_hydro_layer(
  county = NULL,
  watershed_code = NULL,
  watershed_name = NULL,
  sf_object = NULL,
  wbic = NULL,
  where = NULL,
  layer_type = "polygons",
  ...
)

Arguments

county

A character object specifying a county name

watershed_code

A character object specifying the HUC code for a watershed

watershed_name

A character object specifying the HUC name for a watershed

sf_object

Any sf polygon object

wbic

A character object or string of WBIC's

where

SQL statement

layer_type

"lines", "polygons", or "flowlines"

...

Additional parameters to pass to get_spatial_layer

Details

This function will retrieve WDNR's hydro layer. A county, watershed code, watershed_name, or custom sf polygon can be specifie to filter the layer. The layer type can be specified to query either the polylines or polygons hydro spatial layers.

Value

An sf object of class polylines of polygons

Examples

## Not run: 
get_hydro_layer(county = "milwaukee", layer_type = "lines")
get_hydro_layer(watershed_code = "07070006", layer_type = "polygons")
get_hydro_layer(wbic = c("549400", "15000"), layer_type = "polygons")
get_hydro_layer(county = "milwaukee", where = "HYDROTYPE = '508'")

## End(Not run)