[
  {
    "type": "overmap_terrain",
    "id": "field",
    "copy-from": "generic_open_land",
    "name": "Ice Fields",
    "sym": ".",
    "color": "light_gray",
    "see_cost": 2,
    "extras": "field",
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "solid_glacier",
    "name": "glacier",
    "sym": "#",
    "color": "cyan",
    "see_cost": 5,
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "forest",
    "copy-from": "generic_forest",
    "name": "hydrothermal flats",
    "sym": "%",
    "color": "light_red",
    "see_cost": 3,
    "extras": "forest",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 3 ], "chance": 13 },
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "forest_thick",
    "copy-from": "generic_forest",
    "name": "hydrothermal flats",
    "sym": "%",
    "color": "light_red",
    "see_cost": 4,
    "extras": "forest_thick",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 6 ], "chance": 15 },
    "mapgen": [ { "method": "builtin", "name": "forest" } ],
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "forest_water",
    "copy-from": "generic_wetland_forest",
    "name": "hydrothermal flats",
    "sym": "%",
    "color": "cyan",
    "see_cost": 4,
    "extras": "forest_water",
    "spawns": { "group": "GROUP_SWAMP", "population": [ 1, 4 ], "chance": 16 },
    "mapgen": [ { "method": "builtin", "name": "forest" } ],
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE", "RISK_HIGH" ]
  }
]
