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Use CARTO rastertiles URL and warn when basemap key is missing #13

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Merged
viniciusoike merged 1 commit into from
Sep 26, 2026
Merged

Use CARTO rastertiles URL and warn when basemap key is missing #13

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14 changes: 11 additions & 3 deletions global.R
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Original file line number Diff line number Diff line change
Expand Up @@ -333,13 +333,21 @@ metro_theme <- bs_theme(
# because leaflet.providers 2.0.0 has no {key} slot in the CartoDB template
# (rstudio/leaflet#965), so build the tile layer by hand. The key is
# restricted by referrer in the CARTO dashboard; without it (or from a domain
# outside the allowlist) tiles come back watermarked or 403.
# outside the allowlist) tiles come back watermarked or 403. On Connect Cloud
# the key must be set as an app environment variable.

CARTO_KEY <- Sys.getenv("CARTO_BASEMAP_SHINY")

if (!nzchar(CARTO_KEY)) {
cli::cli_warn(c(
"{.envvar CARTO_BASEMAP_SHINY} is not set.",
"i" = "CARTO basemap tiles will show an API key watermark."
))
}

add_carto_tiles <- function(map, variant = "light_all") {
url <- paste0(
"https://{s}.basemaps.cartocdn.com/",
"https://basemaps.cartocdn.com/rastertiles/",
variant,
"/{z}/{x}/{y}{r}.png"
)
Expand All @@ -354,7 +362,7 @@ add_carto_tiles <- function(map, variant = "light_all") {
'&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a>',
'contributors &copy; <a href="https://carto.com/attributions">CARTO</a>'
),
options = tileOptions(subdomains = "abcd", maxZoom = 20)
options = tileOptions(maxZoom = 20)
)
return(map)
}
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