get_nhd_subregion

A Raster* or Spatial* object to serve 
as a template for cropping.

template

A 4-character string indicating the HUC4 NHD subregion to download and crop.

area

A character string indicating where raw downloaded files should be put.
The directory will be created if missing.

raw.dir

<code>get_nhd_subregion</code> returns a list of <code>SpatialPolygonsDataFrame</code>s of the layers of the HUC4 subregion,
 within the specified <code>template</code>. If template is not provided, returns the entire HUC4 subregion.

internal

Functions to automate downloading geospatial data available from
several federated data sources (mainly sources maintained by the US Federal
government). Currently, the package enables extraction from seven datasets:
The National Elevation Dataset digital elevation models (1 and 1/3 arc-second;
USGS); The National Hydrography Dataset (USGS); The Soil Survey Geographic
(SSURGO) database from the National Cooperative Soil Survey (NCSS), which is
led by the Natural Resources Conservation Service (NRCS) under the USDA; the
Global Historical Climatology Network (GHCN), coordinated by National Climatic
Data Center at NOAA; the Daymet gridded estimates of daily weather parameters
for North America, version 3, available from the Oak Ridge National Laboratory's
Distributed Active Archive Center (DAAC); the International Tree Ring Data Bank;
and the National Land Cover Database (NLCD).

R. Bocinsky

FedData

Functions to Automate Downloading Geospatial Data Available from
Several Federated Data Sources

Dylan Beaudette

Scott Chamberlain

get_nhd_subregion function

<dl><dt>template</dt>
<dd>A Raster* or Spatial* object to serve 
as a template for cropping.</dd>
<dt>area</dt>
<dd>A 4-character string indicating the HUC4 NHD subregion to download and crop.</dd>
<dt>raw.dir</dt>
<dd>A character string indicating where raw downloaded files should be put.
The directory will be created if missing.</dd></dl>

Arguments

Download and crop data from a zipped HUC4 subregion
of the National Hydrography Dataset. — get_nhd_subregion

<dl>

<dt>template</dt>
<dd>A Raster* or Spatial* object to serve 
as a template for cropping.</dd>


<dt>area</dt>
<dd>A 4-character string indicating the HUC4 NHD subregion to download and crop.</dd>


<dt>raw.dir</dt>
<dd>A character string indicating where raw downloaded files should be put.
The directory will be created if missing.</dd>

</dl>

get_nhd_subregion: Download and crop data from a zipped HUC4 subregion of the National Hydrography Dataset.

Description

Usage

Value

Arguments