download_itrdb

Downloads and parses the latest zipped (numbered) version of the ITRDB.
This function includes improvements to the <code>read_crn</code> function from the
dplR 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.

internal

Download geospatial data available
from several federated data sources (mainly sources maintained by the
US Federal government). Currently, the package enables extraction from
nine datasets: The National Elevation Dataset digital elevation
models (<https://www.usgs.gov/3d-elevation-program> 1 and 1/3 arc-second;
USGS); The National Hydrography Dataset
(<https://www.usgs.gov/national-hydrography/national-hydrography-dataset>;
USGS); The Soil Survey Geographic (SSURGO) database from the National
Cooperative Soil Survey (<https://websoilsurvey.sc.egov.usda.gov/>; NCSS),
which is led by the Natural Resources
Conservation Service (NRCS) under the USDA;
the Global Historical Climatology Network (<https://www.ncei.noaa.gov/products/land-based-station/global-historical-climatology-network-daily>; GHCN), coordinated by National Climatic Data
Center at NOAA; the Daymet gridded estimates of daily weather
parameters for North America, version 4, available from the Oak Ridge
National Laboratory's Distributed Active Archive Center
(<https://daymet.ornl.gov/>; DAAC); the
International Tree Ring Data Bank; the National Land Cover
Database (<https://www.mrlc.gov/>; NLCD); the Cropland Data Layer from the National Agricultural
Statistics Service (<https://www.nass.usda.gov/Research_and_Science/Cropland/SARS1a.php>; NASS);
and the PAD-US dataset of protected area boundaries (<https://www.usgs.gov/programs/gap-analysis-project/science/pad-us-data-overview>; USGS).

R. Bocinsky

FedData

Download Geospatial Data Available from Several Federated Data
Sources

Dylan Beaudette

Scott Chamberlain

Jeffrey Hollister

Julia Gustavsen

download_itrdb function

<dl><dt>raw.dir</dt>
<dd>A character string indicating where raw downloaded files should be put.
The directory will be created if missing. Defaults to './RAW/ITRDB/'.</dd>
<dt>force.redo</dt>
<dd>If a download already exists, should a new one be created? Defaults to FALSE.</dd></dl>

Arguments

Download the latest version of the ITRDB. — download_itrdb

<dl>

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


<dt>force.redo</dt>
<dd>If a download already exists, should a new one be created? Defaults to FALSE.</dd>

</dl>

download_itrdb: Download the latest version of the ITRDB.

Description

Usage

Value

Arguments