slippy_overlay: Creates an overlay image from 'Mapbox' or 'Stamen' Maps using...

In geoviz: Elevation and GPS Data Visualisation

Description

Creates an overlay image from 'Mapbox' or 'Stamen' Maps using the 'slippymath' package

Usage

slippy_overlay(
  raster_base,
  image_source = "stamen",
  image_type = "watercolor",
  max_tiles = 10,
  api_key,
  return_png = TRUE,
  png_opacity = 0.9
)

Arguments

raster_base	A raster to use to calculate dimensions for the overlay
image_source	Source for the overlay image. Valid entries are "mapbox", "stamen".
image_type	The type of overlay to request. "satellite", "mapbox-streets-v8", "mapbox-terrain-v2", "mapbox-traffic-v1", "terrain-rgb", "mapbox-incidents-v1" (mapbox), "dem" (mapzen) or "watercolor", "toner", "toner-background", "toner-lite" (stamen). You can also request a custom Mapbox style by specifying image_source = "mapbox", image_type = "username/mapid"
max_tiles	Maximum number of tiles to be requested by slippymath
api_key	API key (required for mapbox)
return_png	TRUE to return a png image. FALSE will return a raster
png_opacity	Opacity of the returned image. Ignored if return_png = FALSE

Value

an overlay image for raster_base

Examples

overlay_image <- slippy_overlay(example_raster(),
  image_source = "stamen",
  image_type = "watercolor",
  max_tiles = 2)

geoviz documentation built on March 26, 2020, 9:15 p.m.