read_crn_metadata

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. The user (or <code>read_crn</code>) must tell the function whether
the file is a Schweingruber-type chronology.

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

read_crn_metadata function

<dl><dt>file</dt>
<dd>A character string path pointing to a <code>*.crn</code> file to be read.</dd>
<dt>SCHWEINGRUBER</dt>
<dd>Is the file in the Schweingruber-type Tucson format?</dd></dl>

Arguments

Read metadata from a Tucson-format chronology file. — read_crn_metadata

<dl>

<dt>file</dt>
<dd>A character string path pointing to a <code>*.crn</code> file to be read.</dd>


<dt>SCHWEINGRUBER</dt>
<dd>Is the file in the Schweingruber-type Tucson format?</dd>

</dl>

read_crn_metadata: Read metadata from a Tucson-format chronology file.

Description

Usage

Value

Arguments

Details