get_nlcd_tile

A <code>Raster*</code> or <code>Spatial*</code> object to serve 
as a template for cropping. If missing, entire tile is returned.

template

An integer representing the year of desired NLCD product. Acceptable values are 2011 (default), 2006, and 2001.

year

A character string representing type of the NLCD product. Acceptable values are landcover' (default), 'impervious', and 'canopy'.

dataset

An character string representing tile to be downloaded. Will be of the form 'NxxWxxx', with the 'x' values as numbers.

tileName

A character string indicating where raw downloaded files should be put.
The directory will be created by <code>download_nlcd_tile</code> if missing. Defaults to './RAW/NLCD/'.

raw.dir

<code>get_nlcd_tile</code> returns a <code>RasterLayer</code> cropped within the specified <code>template</code>.
If template is not provided, returns the entire NLCD tile.

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).

get_nlcd_tile: Download and crop a tile from the National Land Cover Database.

Description

Usage

Arguments

Value