linemap: Create Maps Made of Lines

Example

The package contains two functions: linemap() and getgrid()

linemap()

linemap() displays a map made of lines using a data frame of gridded data.

library(linemap)
library(sf)
data("popOcc")
occitanie <- st_read(system.file("gpkg/geofla.gpkg", 
                                 package = "linemap"),
                     layer = "Occitanie")
opar <- par(mar=c(0,0,0,0), bg = "ivory2")
plot(st_geometry(occitanie), col="ivory1", border = NA)
linemap(x = popOcc, var = "pop", k = 2.5, threshold = 50,
        col = "ivory1", border = "ivory4", lwd = 0.6, add = TRUE)
par(opar)

getgrid()

getgrid() transforms a set of polygons (sf objects) into a suitable data frame for linemap().

library(linemap)
library(sf)
bretagne <- st_read(system.file("gpkg/geofla.gpkg", 
                                package = "linemap"),
                    layer = "Bretagne")
france <- st_read(system.file("gpkg/geofla.gpkg", 
                              package = "linemap"),
                  layer = "France")
plot(st_geometry(bretagne))

bret <- getgrid(x = bretagne, cellsize = 2000, var = "POPULATION")
bret[6010:6014,]

opar <- par(mar = c(0,0,0,0))
plot(st_geometry(france), col="lightblue3", border = NA, bg = "lightblue2",
     xlim = c(min(bret$X), max(bret$X)), ylim= c(min(bret$Y), max(bret$Y)))
linemap(x = bret, var = "POPULATION", k = 5, threshold = 1,
        col = "lightblue3", border = "white", lwd = 0.8,
        add = TRUE)
par(opar)

Blogposts

linemap (rgeomatic)

Graphiques linéaires géospatiaux (MTMX):

Installation

Stable

install.packages('linemap')

Dev

library(devtools)
install_github("riatelab/linemap")

Inspiration

Unknown Pleasures (Joy Division)
Population Lines: How and Why I Created It (James Cheshire)
GeospatialLineGraphs (Ryan Brideau)

Alternative

• ggplot2 + ggridges