Error trying to add API key

[johnrharley]

Hi there,

I'm having some trouble adding an API key to access Thunderforest tiles. I'm trying to use ggspatial, but I found some documentation for adding the api key to rosm through source_from_url_format().

However the function does not seem to allow anything after the extension (".jpg", ".png", etc) so I can't pass the API key to the URL in this way.

This works and allows me to pull tiles using ggspatial::annotation_map_tile() but does not take the API key, tiles have the watermark on them,

thunderforest = rosm::source_from_url_format(
  url_format = c('http://a.tile.thunderforest.com/landscape/${z}/${x}/${y}.png',
                 'http://b.tile.thunderforest.com/landscape/${z}/${x}/${y}.png',
                 'http://c.tile.thunderforest.com/landscape/${z}/${x}/${y}.png'),
  attribution = "More on Thunderforest at http://www.thunderforest.com/")

This does not work

> thunderforest = rosm::source_from_url_format(
  url_format = c('http://a.tile.thunderforest.com/landscape/${z}/${x}/${y}.png?apikey=<myapikey>',
                  'http://b.tile.thunderforest.com/landscape/${z}/${x}/${y}.png?apikey=<myapikey>',
                  'http://c.tile.thunderforest.com/landscape/${z}/${x}/${y}.png?apikey=<myapikey>'),
   attribution = "More on Thunderforest at http://www.thunderforest.com/")

Error in match.arg(extension, c("png", "jpeg", "jpg")) : 
  'arg' should be one of “png”, “jpeg”, “jpg”