This function calls the ESRI ArcGIS API to retrieve map imagery to overlay a rayshader map object. It requires a functioning internet connection to obtain the data.
get_image_overlay( bbox, overlay = c("World_Imagery", "NatGeo_World_Map", "USA_Topo_Maps", "World_Physical_Map", "World_Shaded_Relief", "World_Street_Map", "World_Terrain_Base", "World_Topo_Map"), img.width = 600, img.height = 600, lat = NULL, lng = NULL, save.png = FALSE, png.filename = NULL, sr_bbox = 4326, sr_image = 4326 )
bbox | The bounding box for your image. |
---|---|
overlay | One of the available overlays from https://services.arcgisonline.com/ArcGIS/rest/services. |
img.width | Image width, in pixels |
img.height | Image height, in pixels |
lat | A quoted string indicating what named value in the bounding box represents latitude. If NULL, will be inferred from bounding box names. |
lng | A quoted string indicating what named value in the bounding box represents longitude. If NULL, will be inferred from bounding box names. |
save.png | Logical -- should the overlay image be saved? |
png.filename | Filename for the overlay if |
sr_bbox | Spatial reference code (ISO 19111) for bounding box. |
sr_image | Spatial reference code (ISO 19111) for image. |
A matrix object provided by readPNG
, suitable for
use with rayshader
and similar mapping utilities. Returned invisibly.
if (FALSE) { bbox <- get_centroid_bounding_box(c( "lat" = 44.121268, "lng" = -73.903734 ), distance = 10 ) get_image_overlay(bbox, overlay = "World_Imagery") }