diff --git a/data/json/mapgen_palettes/campground.json b/data/json/mapgen_palettes/campground.json
index c5318d778b2eb..a2dac11eeba16 100644
--- a/data/json/mapgen_palettes/campground.json
+++ b/data/json/mapgen_palettes/campground.json
@@ -1,55 +1,57 @@
-{
-  "type": "palette",
-  "id": "campground_palette",
-  "terrain": {
-    "#": "t_grass",
-    "&": "t_thconc_floor",
-    "+": [ "t_door_c", "t_door_o" ],
-    "_": [
-      [ "t_dirt", 3 ],
-      [ "t_grass", 5 ],
-      [ "t_grass_long", 25 ],
-      [ "t_grass_tall", 5 ],
-      [ "t_underbrush", 2 ],
-      [ "t_shrub", 5 ],
-      [ "t_tree", 4 ],
-      [ "t_tree_pine", 2 ],
-      [ "t_tree_birch", 1 ]
-    ],
-    ";": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    ",": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    "B": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    "H": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
-    "n": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
-    "S": "t_thconc_floor",
-    "T": "t_thconc_floor",
-    "f": "t_floor",
-    "D": "t_floor",
-    "h": "t_floor",
-    ".": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
-    "b": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    "c": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    "s": [ [ "t_dirt", 5 ], [ "t_grass", 16 ], [ "t_grass_long", 1 ] ],
-    "t": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
-    "|": "t_wall_w",
-    "w": "t_window",
-    "o": "t_pit_shallow",
-    "O": "t_gutter_downspout"
-  },
-  "furniture": {
-    "D": "f_desk",
-    "h": "f_chair",
-    "H": "f_camp_chair",
-    "#": "f_large_canvas_wall",
-    "&": "f_toilet",
-    ";": "f_large_groundsheet",
-    ",": "f_center_groundsheet",
-    "B": "f_brazier",
-    "S": "f_sink",
-    "b": "f_bench",
-    "c": [ "f_large_canvas_door", "f_large_canvas_door_o" ],
-    "t": "f_table",
-    "n": "f_tourist_table",
-    "o": "f_firering"
+[
+  {
+    "type": "palette",
+    "id": "campground_palette",
+    "terrain": {
+      "#": "t_grass",
+      "&": "t_thconc_floor",
+      "+": [ "t_door_c", "t_door_o" ],
+      "_": [
+        [ "t_dirt", 3 ],
+        [ "t_grass", 5 ],
+        [ "t_grass_long", 25 ],
+        [ "t_grass_tall", 5 ],
+        [ "t_underbrush", 2 ],
+        [ "t_shrub", 5 ],
+        [ "t_tree", 4 ],
+        [ "t_tree_pine", 2 ],
+        [ "t_tree_birch", 1 ]
+      ],
+      ";": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      ",": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      "B": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      "H": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
+      "n": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
+      "S": "t_thconc_floor",
+      "T": "t_thconc_floor",
+      "f": "t_floor",
+      "D": "t_floor",
+      "h": "t_floor",
+      ".": [ [ "t_dirt", 100 ], [ "t_grass", 5 ], [ "t_grass_long", 1 ] ],
+      "b": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      "c": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      "s": [ [ "t_dirt", 5 ], [ "t_grass", 16 ], [ "t_grass_long", 1 ] ],
+      "t": [ [ "t_dirt", 10 ], [ "t_grass", 15 ], [ "t_grass_long", 2 ] ],
+      "|": "t_wall_w",
+      "w": "t_window",
+      "o": "t_pit_shallow",
+      "O": "t_gutter_downspout"
+    },
+    "furniture": {
+      "D": "f_desk",
+      "h": "f_chair",
+      "H": "f_camp_chair",
+      "#": "f_large_canvas_wall",
+      "&": "f_toilet",
+      ";": "f_large_groundsheet",
+      ",": "f_center_groundsheet",
+      "B": "f_brazier",
+      "S": "f_sink",
+      "b": "f_bench",
+      "c": [ "f_large_canvas_door", "f_large_canvas_door_o" ],
+      "t": "f_table",
+      "n": "f_tourist_table",
+      "o": "f_firering"
+    }
   }
-}
+]