--- a/data/json/overmap/map_extras.json
+++ b/data/json/overmap/map_extras.json
@@ -129,7 +129,7 @@
   {
     "id": "mx_portal",
     "type": "map_extra",
-    "name": "Portal",
+    "name": "Shimmering Portal",
     "description": "A portal is here.",
     "generator": { "generator_method": "map_extra_function", "generator_id": "mx_portal" },
     "sym": "P",
@@ -139,7 +139,7 @@
   {
     "id": "mx_portal_in",
     "type": "map_extra",
-    "name": "Portal",
+    "name": "Tear in Reality",
     "description": "A portal is here.",
     "generator": { "generator_method": "map_extra_function", "generator_id": "mx_portal_in" },
     "sym": "P",
@@ -239,16 +239,22 @@
   {
     "id": "mx_trees",
     "type": "map_extra",
-    "name": "Stand of trees",
+    "name": "Copse of trees",
     "description": "A copse of trees.",
-    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_trees_map" }
+    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_trees_map" },
+    "sym": "t",
+    "color": "light_green",
+    "autonote": true
   },
   {
     "id": "mx_grass",
     "type": "map_extra",
     "name": "Tall grass",
     "description": "A meadow of tall grass.",
-    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_grass_map" }
+    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_grass_map" },
+    "sym": "g",
+    "color": "light_green",
+    "autonote": true
   },
   {
     "id": "mx_fallen_shed",
@@ -256,7 +262,7 @@
     "name": "Derelict shed",
     "description": "A collapsed shed.",
     "generator": { "generator_method": "update_mapgen", "generator_id": "mx_fallen_shed_map" },
-    "sym": "N",
+    "sym": "s",
     "color": "brown",
     "autonote": true
   },
@@ -295,7 +302,9 @@
     "name": "Burned Ground",
     "description": "This area has been burned down.",
     "generator": { "generator_method": "map_extra_function", "generator_id": "mx_burned_ground" },
-    "sym": "."
+    "sym": ".",
+    "color": "white",
+    "autonote": true
   },
   {
     "id": "mx_point_burned_ground",
@@ -303,7 +312,9 @@
     "name": "Burned Ground",
     "description": "This area has been burned down.",
     "generator": { "generator_method": "map_extra_function", "generator_id": "mx_point_burned_ground" },
-    "sym": "."
+    "sym": ".",
+    "color": "white",
+    "autonote": true
   },
   {
     "id": "mx_marloss_pilgrimage",
@@ -321,21 +332,29 @@
     "name": "Casings",
     "description": "A shootout happened here.",
     "generator": { "generator_method": "map_extra_function", "generator_id": "mx_casings" },
-    "sym": "C"
+    "sym": "C",
+    "color": "white",
+    "autonote": true
   },
   {
     "id": "mx_looters",
     "type": "map_extra",
     "name": "Looters",
     "description": "Some looters are gathering everything not nailed down.",
-    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_looters" }
+    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_looters" },
+    "sym": "L",
+    "color": "red",
+    "autonote": true
   },
   {
     "id": "mx_corpses",
     "type": "map_extra",
     "name": "Corpses",
     "description": "Some unfortunates from the billions lost in the Cataclysm.",
-    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_corpses" }
+    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_corpses" },
+    "sym": "c",
+    "color": "light_red",
+    "autonote": true
   },
   {
     "id": "mx_nest_wasp",
@@ -362,7 +381,10 @@
     "type": "map_extra",
     "name": "Prison Bus",
     "description": "A prison bus.",
-    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_prison_bus" }
+    "generator": { "generator_method": "update_mapgen", "generator_id": "mx_prison_bus" },
+    "sym": "P",
+    "color": "blue",
+    "autonote": true
   },
   {
     "id": "mx_mass_grave",
@@ -377,9 +399,12 @@
   {
     "id": "mx_grave",
     "type": "map_extra",
-    "name": "Grave",
-    "description": "A grave.",
-    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_grave" }
+    "name": "Solitary Grave",
+    "description": "A solitary grave.",
+    "generator": { "generator_method": "map_extra_function", "generator_id": "mx_grave" },
+    "sym": "c",
+    "color": "white",
+    "autonote": true
   },
   {
     "id": "mx_sewer_round",