download_itrdb

A character string indicating where raw downloaded files should be put.
The directory will be created if missing. Defaults to "./RAW/ITRDB/".

raw.dir

If a download already exists, should a new one be created? Defaults to FALSE.

force.redo

Downloads and parses the latest zipped (numbered) version of the ITRDB.
This function includes improvements to the <code><a href="/link/read_crn?package=FedData&version=2.0.2" rd-options="" data-mini-rdoc="FedData::read_crn">read_crn</a></code> function from the 
<pkg>dplR</pkg> library. The principle changes are better parsing of metadata, and support
for the Schweingruber-type Tucson format. Chronologies that are unable to be read
are reported to the user.

Functions to automate downloading geospatial data available from
    several federated data sources (mainly sources maintained by the US Federal
    government). Currently, the package allows for retrieval of five 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; and the International Tree Ring Data Bank. Additional
    data sources are in the works, including global DEM resources (ETOPO1, ETOPO5,
    ETOPO30, SRTM), global soils (HWSD), MODIS satellite data products, the National
    Atlas (US), Natural Earth, PRISM, and WorldClim.

download_itrdb: Download the latest version of the ITRDB.

Description

Usage

Arguments

Value