osmplotr (version 0.1-3)

add_colourbar: add_colorbar

Description

Adds a colourbar to an existing map. Intended to be used in combination with add_osm_surface (). At present, only plots on right side of map.

Usage

add_colourbar(len = c(0.1, 0.9), width = 0.02, side = 1, cols = NULL,
  zlims = c(0, 1), transp = 0.4, tcol = "black", ps = 8)

Arguments

len

Relative positions of start and end of colourbar

width

Relative width

side

(1,2,3,4) for colourbar (below, left, above, right) of map. (Not yet implemented.)

cols

Vector of colours

zlims

Vector of (min,max) values for scale of colourbar. These should be the values returned from add_osm_surface ().

transp

Transparency level of region immediately surrounding colourbar, including behind text. Lower values are more transparent.

tcol

Colour of text, tick marks, and lines on colourbar

ps

PointSize of text labels

Examples

plot_osm_basemap (bbox=get_bbox (c (-0.15, 51.5, -0.1, 51.52)), col="gray20")
add_osm_objects (london$dat_BNR, col="gray40") # non-residential buildings
add_axes ()
add_colourbar (cols=heat.colors(20), tcol="white", side=4)