calc_return_locs

Check the time column for proper class and, if <code>geom = TRUE</code>,
transform <code>data.frame</code> into a <code>SpatVector</code> object.

internal

auxiliary

Functions are designed to facilitate access to and utility with large scale, publicly available environmental data in R. The package contains functions for downloading raw data files from web URLs (download_data()), processing the raw data files into clean spatial objects (process_covariates()), and extracting values from the spatial data objects at point and polygon locations (calculate_covariates()). These functions call a series of source-specific functions which are tailored to each data sources/datasets particular URL structure, data format, and spatial/temporal resolution. The functions are tested, versioned, and open source and open access. For sum_edc() method details, see Messier, Akita, and Serre (2012) <doi:10.1021/es203152a>.

Kyle Messier

amadeus

Accessing and Analyzing Large-Scale Environmental Data

Mitchell Manware

Insang Song

Eva Marques

Mariana Alifa Kassien

Elizabeth Scholl

Spatiotemporal Exposures and Toxicology Group 

calc_return_locs function

<dl><dt>covar</dt>
<dd>data.frame(1). Calculated covariates <code>data.frame</code>.</dd>
<dt>POSIXt</dt>
<dd>logical(1). Should the time values in <code>covar</code> be of class
<code>POSIXt</code>? If <code>FALSE</code>, the time values will be checked for integer class
(year and year-month).</dd>
<dt>geom</dt>
<dd>FALSE/"sf"/"terra". Should <code>covar</code> be returned as a
<code>data.frame</code>? Default is <code>FALSE</code>, options with geometry are "sf" or "terra".</dd>
<dt>crs</dt>
<dd>terra::crs(1). Coordinate reference system (inherited from
<code>from</code>).</dd></dl>

Arguments

Author

Prepare covariates for return — calc_return_locs

<dl>

<dt>covar</dt>
<dd>data.frame(1). Calculated covariates <code>data.frame</code>.</dd>


<dt>POSIXt</dt>
<dd>logical(1). Should the time values in <code>covar</code> be of class
<code>POSIXt</code>? If <code>FALSE</code>, the time values will be checked for integer class
(year and year-month).</dd>


<dt>geom</dt>
<dd>FALSE/"sf"/"terra". Should <code>covar</code> be returned as a
<code>data.frame</code>? Default is <code>FALSE</code>, options with geometry are "sf" or "terra".</dd>


<dt>crs</dt>
<dd>terra::crs(1). Coordinate reference system (inherited from
<code>from</code>).</dd>

</dl>

Prepare covariates for return

calc_return_locs: Prepare covariates for return

Description

Usage

Value

Arguments

Author