download_hash

Create a combined SHA-1 hash based on the contents and sizes of files
in a specified directory. System-specific metadata (e.g. full file paths,
access times, or user information) are not tracked, ensuring the hash
remains consistent across different systems, users, and access times.

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 

download_hash function

<dl><dt>hash</dt>
<dd>logical(1). Create hash of downloaded files.</dd>
<dt>dir</dt>
<dd>character(1). Directory path.</dd></dl>

Arguments

Create hash of downloaded files. — download_hash

<dl>

<dt>hash</dt>
<dd>logical(1). Create hash of downloaded files.</dd>


<dt>dir</dt>
<dd>character(1). Directory path.</dd>

</dl>

Create hash of downloaded files.

download_hash: Create hash of downloaded files.

Description

Usage

Value

Arguments