rvertnet (version 0.2.2)

vertmap: Make a simple map to visualize VertNet data.

Description

Plots record locations on a world or regional map using latitude/longitude data returned by a VertNet search.

Usage

vertmap(input = NULL, mapdatabase = "world", region = ".",
  geom = geom_point, jitter = NULL)

Arguments

input

A data.frame, e.g., one generated by calling vertsearch; must include columns "decimallatitude" and "decimallongitude"

mapdatabase

The base map on which your data are displayed; what you choose here determines what you can choose in the region parameter; one of: county, state, usa, world, world2, france, italy, or nz

region

The region in which your data are displayed; to see region names for the "world" database layer, run sort(unique(map_data("world")$region)) after loading packages maps and ggplot2; to see region names for the US "state" layer, run sort(

geom

Specifies the type of object being plotted; one of: geom_point or geom_jitter (do not use quotes)

jitter

If geom = geom_jitter, the amount by which to jitter points in width, height, or both

Value

• Map of record locations displayed on the selected base map

Details

vertmap uses decimal latitude and longitude data in records generated by an rvertnet search to display returned records on a specified base map. Taxa are color-coded by scientific name, if available. Adapt the vertmap code to construct maps according to your own specfications.

Examples

out <- vertsearch("Junco hyemalis") # get occurrence records
vertmap(out)                        # map occurrence records

# Records are color coded by dwc term "scientificname" - sometimes unavailble
out <- vertsearch("mustela nigripes")
vertmap(input = out, mapdatabase = "state")

# Use searchbyterm() to match records with mapped region
spec.out <- searchbyterm(sp = "ochotona princeps", st = "california")
vertmap(input = spec.out, mapdatabase = "state", region = "california")

# Many species
splist <- c("Accipiter erythronemius", "Aix sponsa", "Haliaeetus leucocephalus",
		"Corvus corone", "Threskiornis molucca", "Merops malimbicus")
out <- lapply(splist, function(x) vertsearch(t=x, lim=500))
vertmap(out)