GitHub - paleolimbot/ggspatial: Enhancing spatial visualization in ggplot2 (original) (raw)

ggspatial

Spatial data plus the power of the ggplot2 framework means easier mapping.

Installation

The package is available on CRAN, and can be installed usinginstall.packages("ggspatial"). The development version can be installed via remotes.

install.packages("ggspatial")

Or for the development version:

install.packages("remotes") # if remotes isn't installed remotes::install_github("paleolimbot/ggspatial")

Introduction

This package is a framework for interacting with spatial data usingggplot2 as a plotting backend. The package supports sf package objects, sp package objects, and raster package objects, and uses geom_sf() and coord_sf() to do most of the heavy lifting with respect to coordinate transformation.

library(ggplot2) library(ggspatial) load_longlake_data()

ggplot() +

loads background map tiles from a tile source

annotation_map_tile(zoomin = -1) +

annotation_spatial() layers don't train the scales, so data stays central

annotation_spatial(longlake_roadsdf, size = 2, col = "black") + annotation_spatial(longlake_roadsdf, size = 1.6, col = "white") +

raster layers train scales and get projected automatically

layer_spatial(longlake_depth_raster, aes(colour = after_stat(band1))) +

make no data values transparent

scale_fill_viridis_c(na.value = NA) +

layer_spatial trains the scales

layer_spatial(longlake_depthdf, aes(fill = DEPTH_M)) +

spatial-aware automagic scale bar

annotation_scale(location = "tl") +

spatial-aware automagic north arrow

annotation_north_arrow(location = "br", which_north = "true")