geonames: Retrieve city names and locations

In mapmisc: Utilities for Producing Maps

Retrieve city names and locations

Description

This function uses the geonames package to provide city names and locations from www.geonames.org.

Usage

	GNcities(north, east, south, west, lang = "en", maxRows = 10, buffer=0)
	GNsearch(..., crs=crsLL)
	

Arguments

north	A bounding box or SpatialPoints or SpatialPolygons or Extent or Raster object, or a decimal degree of longitude.
east, south, west	If north is numeric, decimal degree bounding box.
lang	Language for internationalised returned text
maxRows	Limit on returned rows
buffer	passed to extend
...	Various search arguments
crs	projection for the output

Value

A SpatialPointsDataFrame with the sampe projection north if it exists, otherwise in long-lat.

See Also

GNcities, GNsearch

Examples

## Not run: 
	GNsearch(q="Toronto Ontario", maxRows = 3)

## End(Not run)


library('terra')
myraster = rast(
	matrix(1:100,10,10),
	extent=ext(8,18,0,10), crs=crsLL)

options(geonamesUsername="myusernamehere") 
if(file.exists("~/geonamesUsername.R")) source("~/geonamesUsername.R")

if(requireNamespace("geonames", quietly = TRUE)) { 

cities=try(GNcities(myraster, max=5), silent=TRUE)
mytiles = openmap(myraster, zoom=5, buffer=1)

oldpar=map.new(mytiles)
plot(mytiles, add=TRUE)
if(!all(class(cities)=='try-error')) {
points(cities, col='red')
text(cities, labels=cities$name, col='red',pos=4)
}


par(oldpar)

}

mapmisc documentation built on April 15, 2024, 3 p.m.