mapull: Create a map displaying earthquake data

In jbrabazon13/quakr: Visualize Earthquake Datasets (one line, title case)

Description

mapull looks through the dataframe inputted and pulls a map from google depending on the latitude and longitude in the dataframe. Earthquake depths and magnitudes are plotted in plan view on the map. This function uses the ggmap package.

Usage

mapull(data, magnitude = FALSE)

Arguments

data	a dataframe containing the following earthquake values labeled as follows: latitude, longitude, depth, magnitude (labeled as mag). This data can easily be exported as a .csv from https://earthquake.usgs.gov/earthquakes/search/. This function was made to work specifically for the exported USGS data, however, it can work with properly labeled dataframes.
magnitude	If magnitude = TRUE, magnitude of events are plotted on top of the pulled google map. If magnitude = FALSE, then earthquakes are plotted on top of the google map with a gradation of color indicating increased depth.

Value

A google map with bounds containing the latitude and longitude of the dataframe with either the depths or magnitude of the earthquakes in the dataframe plotted on top of the map.

References

D. Kahle and H. Wickham. ggmap: Spatial Visualization with ggplot2. The R, Journal, 5(1), 144-161. URL, http://journal.r-project.org/archive/2013-1/kahle-wickham.pdf

Examples

mapull(data = dataframe, magnitude = TRUE)

jbrabazon13/quakr documentation built on May 21, 2019, 1:19 p.m.