read_crn_data

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

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
nine 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 4, available from the Oak Ridge
National Laboratory's Distributed Active Archive Center (DAAC); the
International Tree Ring Data Bank; the National Land Cover
Database (NLCD); the Cropland Data Layer from the National Agricultural
Statistics Service; and the PAD-US dataset of protected area boundaries
from the USGS.

R. Bocinsky

FedData

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

Dylan Beaudette

Scott Chamberlain

Jeffrey Hollister

Julia Gustavsen

read_crn_data 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 chronology data from a Tucson-format chronology file. — read_crn_data

<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_data: Read chronology data from a Tucson-format chronology file.

Description

Usage

Value

Arguments