extract_ssurgo_data

<code>extract_ssurgo_data</code> creates a directed graph of the joins in a SSURGO tabular dataset,
and then iterates through the tables, only retaining data pertinent to a set of mapunits.

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

extract_ssurgo_data function

<dl><dt>tables</dt>
<dd>A list of SSURGO tabular data.</dd>
<dt>mapunits</dt>
<dd>A character vector of mapunits (likely dropped from SSURGO spatial data)
defining which mapunits to retain.</dd></dl>

Arguments

Extract data from a SSURGO database pertaining to a set of mapunits. — extract_ssurgo_data

<dl>

<dt>tables</dt>
<dd>A list of SSURGO tabular data.</dd>


<dt>mapunits</dt>
<dd>A character vector of mapunits (likely dropped from SSURGO spatial data)
defining which mapunits to retain.</dd>

</dl>

extract_ssurgo_data: Extract data from a SSURGO database pertaining to a set of mapunits.

Description

Usage

Value

Arguments