calc_time

Prepare the time values for covariate calculation based on type of time
value.

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_time function

<dl><dt>time</dt>
<dd>Time value</dd>
<dt>format</dt>
<dd>Type of time to return in the <code>$time</code> column. Can be
"timeless" (ie. Ecoregions data), "date" (ie. NARR data), "hour"
(ie. GEOS data), "year" (ie. SEDAC population data), or "yearmonth"
(ie. TerraClimate data).</dd></dl>

Arguments

Prepare time values — calc_time

<dl>

<dt>time</dt>
<dd>Time value</dd>


<dt>format</dt>
<dd>Type of time to return in the <code>$time</code> column. Can be
"timeless" (ie. Ecoregions data), "date" (ie. NARR data), "hour"
(ie. GEOS data), "year" (ie. SEDAC population data), or "yearmonth"
(ie. TerraClimate data).</dd>

</dl>

Prepare time values

calc_time: Prepare time values

Description

Usage

Value

Arguments