Upload depth_interactive_map_alpha.R

depth_interactive_map_alpha.R

@@ -2807,8 +2807,9 @@ server <- function(input, output, session) {
     ocved_pts    <- NULL; ged_pts    <- NULL
 
     m <- maplibre(
-      style  = carto_style("positron"),
-      center = c(-102.5, 23.6), zoom = 4.5
+      style   = carto_style("positron"),
+      center  = c(-102.5, 23.6), zoom = 4.5,
+      maxZoom = 22   # Carto Positron renders cleanly to z22
     ) |>
       add_draw_control(
         position          = "top-right",
@@ -2837,7 +2838,15 @@ server <- function(input, output, session) {
       add_raster_layer(
         id                   = "satellite-basemap",
         source               = "satellite-source",
-        raster_opacity       = zoom_fade_in(13, 16),
+        # Fade satellite in over z13-16 (as before), keep it crisp at z17, then
+        # fade it back OUT past z17 so the carto positron vector basemap shows
+        # through where Esri returns "Map data not yet available" gray plates.
+        raster_opacity       = list("interpolate", list("linear"), list("zoom"),
+                                     13, 0,
+                                     16, 1,
+                                     17, 1,
+                                     19, 0.2,
+                                     20, 0),
         raster_fade_duration = 300
       )