Leaflet Map Plugin for Drawing and Editing

A collection of tools for interactive manipulation of (spatial) data layers on leaflet web maps. Tools include editing of existing layers, creation of new layers through drawing of shapes (points, lines, polygons), deletion of shapes as well as cutting holes into existing shapes. Provides control over options to e.g. prevent self-intersection of polygons and lines or to enable/disable snapping to align shapes.

leafpm - Interactively Edit Spatial Vector Features in R

leafpm is a plugin for leaflet to provide map editing and drawing in R with Leaflet.pm. It is based closely off of leaflet.extras addDrawToolbar(). leafpm is intended to supplement leaflet.extras with better support for snapping and holes.

Installation

You can install the released version of leafpm from CRAN with:

install.packages("leafpm")

Example

library(mapview)
library(leafpm)
library(sf)

outer1 = matrix(c(0,0,10,0,10,10,0,10,0,0),ncol=2, byrow=TRUE)
hole1 = matrix(c(1,1,1,2,2,2,2,1,1,1),ncol=2, byrow=TRUE)
hole2 = matrix(c(5,5,5,6,6,6,6,5,5,5),ncol=2, byrow=TRUE)
outer2 = matrix(c(11,0,11,1,12,1,12,0,11,0),ncol=2, byrow=TRUE)

pts1 = list(outer1, hole1, hole2)
pts2 = list(outer2)

pl1 = st_sf(geom = st_sfc(st_polygon(pts1)))
pl2 = st_sf(geom = st_sfc(st_polygon(pts2)))

mpl = st_sf(geom = st_combine(rbind(pl1, pl2)))

addPmToolbar(
  mapview(mpl)@map,
  targetGroup = "mpl"
)

mapedit Integration

leafpm was designed to work as an editor in mapedit, so you can get your edits back into the R session. For instance,

#install.packages("mapedit")
library(mapedit)

drawFeatures(editor = "leafpm")

Code of Conduct

Please note that the ‘leafpm’ project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.