get_huc: Find WBD HUC unit subsets

In dblodgett-usgs/nhdplusTools: NHDPlus Tools

Find WBD HUC unit subsets

Description

Subsets WBD features by location (POINT), area (POLYGON), or set of HUC IDs.

Usage

get_huc(AOI = NULL, id = NULL, t_srs = NULL, buffer = 0.5, type = "huc12")

Arguments

AOI	sf (MULTI)POINT or (MULTI)POLYGON. An 'area of interest' can be provided as either a location (sf POINT) or area (sf POLYGON) in any Spatial Reference System.
id	WBD HUC ID(s)
t_srs	character (PROJ string or EPSG code) or numeric (EPSG code). A user specified - target -Spatial Reference System (SRS/CRS) for returned objects. Will default to the CRS of the input AOI if provided, and to 4326 for ID requests.
buffer	numeric. The amount (in meters) to buffer a POINT AOI by for an extended search. Default = 0.5
type	character. Type of feature to return ('huc02', 'huc04', 'huc06', 'huc08', 'huc10', 'huc12', 'huc12_nhdplusv2'). Pulls 'huc02'-'huc12' from a web service that hosts a snapshot of the Watershed Boundary Dataset from October, 2020. See <doi:10.5066/P92U7ZUT> for full source data. See https://labs.waterdata.usgs.gov/geoserver/web/ for the web service. 'huc12_nhdplusv2' derives from a snapshot of the WBD available from the nhdplusv2. See download_nhdplusv2 for source data documentation.

Details

The returned object(s) will have the same Spatial Reference System (SRS) as the input AOI. If a individual or set of IDs are used to query, then the default geoserver CRS of EPSG:4326 is preserved. In all cases, a user-defined SRS can be passed to t_srs which will override all previous SRS (either input or default). All buffer and distance operations are handled internally using in EPSG:5070 Albers Equal Area projection

Value

a simple features (sf) object

dblodgett-usgs/nhdplusTools documentation built on March 26, 2024, 12:12 p.m.