population_map: Retrieve a map for a set of populations.

In dyerlab/gstudio: Tools Related to the Spatial Analysis of Genetic Marker Data

Retrieve a map for a set of populations.

Description

This function uses the ggmap package to grab a map of the area where the samples in the , are located.

Usage

population_map(coords, map.source = "google", map.type = "terrain", zoom = NA)

Arguments

coords	A data.frame that has Strata, Latitude, and Longitude
map.source	Where the map should be retrieved from. Common options include google Get the map from Google Maps (this is the default) osm Open Streat Map derived
map.type	What kind of map to use. Current types include: sattelite A satellite image of the area. terrain A stylized topological map (this is the default). road The default google road map. hybrid Mix of road and terrain maps.
zoom	The default zoom level when using google maps (default NA). If omitted the code will attempt to define the map by the bounding box defined by the coords

Value

A map raster

Note

This is a bit of a rough attempt and should be used only sparingly. I have found that the ability to get Google Maps that cover all the sites is a bit difficult unless you play around with the zoom option. Google has fixed zoom levels so you may need to try this a few times before getting what you want.

Author(s)

Rodney J. Dyer [e-mail]

dyerlab/gstudio documentation built on Feb. 2, 2024, 8:24 p.m.