bubbleMap: Create a bubble plot of spatial data on Google Maps

In RgoogleMaps: Overlays on Static Maps

Description

This function creates a bubble plot of spatial

data, with options for bicolour residual plots.

Usage

bubbleMap(SP, coords = c("x", "y"), crs = sp::CRS("+proj=longlat +datum=WGS84"), 


    map, filename = "", zcol = 1, max.radius = 100, key.entries, 


    do.sqrt = TRUE, colPalette = NULL, strokeColor = "#FFAA00", 


    alpha = 0.7, strokeWeight = 1, LEGEND = TRUE, legendLoc = "topleft", 


    verbose = 0)

Arguments

SP	object of class data.frame or SpatialPointsDataFrame-class with associated coordinate reference systems
coords	names of coordinate columns
crs	coordinate reference systems
map	map object; if missing map is downloaded from server
filename	filename to save the map under, IF map object not given
zcol	variable column name, or column number after removing spatial coordinates from x@data: 1 refers to the first non-coordinate column
max.radius	value for largest circle (the plotting symbols) in metre, circumcircle of triange or quadrangle (square)
key.entries	value for largest circle (the plotting symbols) in metre, circumcircle of triange or quadrangle (square)
do.sqrt	logical; if TRUE the plotting symbol area (sqrt(diameter)) is proportional to the value of the z-variable; if FALSE, the symbol size (diameter) is proportional to the z-variable
colPalette	colours to be used to fill plotting symbols; numeric vector of same size like key.entries colours to be used to fill features depending on attribute
strokeColor	the color to draw the border of circle (the plotting symbols)
alpha	the fill opacity between 0.0 and 1.0
strokeWeight	the stroke width in pixels
LEGEND	logical; if TRUE add bubbleLegend
legendLoc	the x and y co-ordinates to be used to position the legend. They can be specified by keyword or in any way which is accepted by legend
verbose	level of verbosity

Value

##################################################################

map structure or URL used to download the tile.

Author(s)

Markus Loecher

Examples

data(lat.lon.meuse, package="loa", envir = environment())





map <- GetMap(center=c(lat=50.97494,lon=5.743606), zoom=13,


       size=c(480,480),destfile = file.path(tempdir(),"meuse.png"),


        maptype="mobile", SCALE = 1);





par(cex=1.5)


bubbleMap(lat.lon.meuse, coords = c("longitude","latitude"), map=map,


      zcol='zinc', key.entries = 100+ 100 * 2^(0:4));

RgoogleMaps documentation built on May 2, 2019, 5:03 p.m.