diff --git a/map-gen-settings.json b/map-gen-settings.json
index 71f6ed6..9f8ebb6 100644
--- a/map-gen-settings.json
+++ b/map-gen-settings.json
@@ -1,19 +1,95 @@
 {
-  "_comment": "Sizes can be specified as none, very-low, low, normal, high, very-high",
-
-  "terrain_segmentation": "normal",
-  "water": "normal",
+  "_terrain_segmentation_comment": "The inverse of 'water scale' in the map generator GUI.",
+  "terrain_segmentation": 1,
+  "_water_comment": [
+    "The equivalent to 'water coverage' in the map generator GUI. Higher coverage means more water in larger oceans.",
+    "Water level = 10 * log2(this value)"
+  ],
+  "water": 1,
+  "_comment_width+height": "Width and height of map, in tiles; 0 means infinite",
   "width": 0,
   "height": 0,
-  "starting_area": "normal",
+  "_starting_area_comment": "Multiplier for 'biter free zone radius'",
+  "starting_area": 1,
   "peaceful_mode": false,
-  "autoplace_controls":
-  {
-    "coal": {"frequency": "low", "size": "normal", "richness": "normal"},
-    "copper-ore": {"frequency": "low", "size": "normal", "richness": "normal"},
-    "crude-oil": {"frequency": "low", "size": "high", "richness": "normal"},
-    "enemy-base": {"frequency": "very-high", "size": "very-high", "richness": "very-high"},
-    "iron-ore": {"frequency": "low", "size": "normal", "richness": "normal"},
-    "stone": {"frequency": "low", "size": "normal", "richness": "normal"}
-  }
-}
+  "autoplace_controls": {
+    "coal": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "stone": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "copper-ore": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "iron-ore": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "uranium-ore": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "crude-oil": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "trees": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    },
+    "enemy-base": {
+      "frequency": 1,
+      "size": 1,
+      "richness": 1
+    }
+  },
+  "cliff_settings": {
+    "_name_comment": "Name of the cliff prototype",
+    "name": "cliff",
+    "_cliff_elevation_0_comment": "Elevation of first row of cliffs",
+    "cliff_elevation_0": 10,
+    "_cliff_elevation_interval_comment": [
+      "Elevation difference between successive rows of cliffs.",
+      "This is inversely proportional to 'frequency' in the map generation GUI. Specifically, when set from the GUI the value is 40 / frequency."
+    ],
+    "cliff_elevation_interval": 40,
+    "_richness_comment": "Called 'cliff continuity' in the map generator GUI. 0 will result in no cliffs, 10 will make all cliff rows completely solid",
+    "richness": 1
+  },
+  "_property_expression_names_comment": [
+    "Overrides for property value generators (map type)",
+    "Leave 'elevation' blank to get 'normal' terrain.",
+    "Use 'elevation': '0_16-elevation' to reproduce terrain from 0.16.",
+    "Use 'elevation': '0_17-island' to get an island.",
+    "Moisture and terrain type are also controlled via this.",
+    "'control-setting:moisture:frequency:multiplier' is the inverse of the 'moisture scale' in the map generator GUI.",
+    "'control-setting:moisture:bias' is the 'moisture bias' in the map generator GUI.",
+    "'control-setting:aux:frequency:multiplier' is the inverse of the 'terrain type scale' in the map generator GUI.",
+    "'control-setting:aux:bias' is the 'terrain type bias' in the map generator GUI."
+  ],
+  "property_expression_names": {
+    "control-setting:moisture:frequency:multiplier": "1",
+    "control-setting:moisture:bias": "0",
+    "control-setting:aux:frequency:multiplier": "1",
+    "control-setting:aux:bias": "0"
+  },
+  "starting_points": [
+    {
+      "x": 0,
+      "y": 0
+    }
+  ],
+  "_seed_comment": "Use null for a random seed, number for a specific seed.",
+  "seed": null
+}
\ No newline at end of file