[
  {
    "type": "overmap_terrain",
    "id": "special_deep_rock",
    "//": "For placing terrain lookalikes that unlike placing said terrain don't allow mapgen intended for the naturally found version",
    "vision_levels": "always_full",
    "name": "solid rock",
    "looks_like": "deep_rock",
    "sym": "%",
    "color": "dark_gray",
    "see_cost": "opaque",
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "special_rock",
    "vision_levels": "always_full",
    "name": "solid rock",
    "sym": "%",
    "color": "dark_gray",
    "looks_like": "empty_rock",
    "see_cost": "opaque",
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "special_earth",
    "name": "solid earth",
    "vision_levels": "always_full",
    "sym": "#",
    "color": "brown",
    "looks_like": "solid_earth",
    "see_cost": "opaque",
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": [ "special_field" ],
    "copy-from": "generic_open_land",
    "vision_levels": "open_land",
    "name": "field",
    "sym": ".",
    "color": "brown",
    "looks_like": "field",
    "see_cost": "none",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 1 ], "chance": 13 },
    "travel_cost_type": "field",
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "special_field_highway",
    "copy-from": "special_field",
    "extend": { "flags": [ "HIGHWAY", "HIGHWAY_SPECIAL" ] }
  },
  {
    "type": "overmap_terrain",
    "id": [ "special_forest", "special_forest_isherwood" ],
    "copy-from": "generic_forest",
    "name": "forest",
    "sym": "F",
    "color": "green",
    "looks_like": "forest",
    "see_cost": "spaced_high",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 3 ], "chance": 13 },
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE" ]
  },
  {
    "type": "overmap_terrain",
    "id": "lab_subway_vent_shaft_surface",
    "name": "Lab access shaft",
    "sym": "L",
    "color": "blue",
    "vision_levels": "forested",
    "see_cost": "spaced_high",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 3 ], "chance": 13 },
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE" ]
  },
  {
    "type": "overmap_terrain",
    "id": [ "special_forest_thick", "special_forest_thick_isherwood" ],
    "copy-from": "generic_forest",
    "name": "forest",
    "sym": "F",
    "color": "green",
    "looks_like": "forest_thick",
    "see_cost": "spaced_high",
    "spawns": { "group": "GROUP_FOREST", "population": [ 0, 6 ], "chance": 15 },
    "flags": [ "NO_ROTATE", "SOURCE_FORAGE" ]
  },
  {
    "type": "overmap_terrain",
    "abstract": "generic_air",
    "vision_levels": "roof_or_air",
    "see_cost": "all_clear",
    "name": "open air",
    "sym": ".",
    "color": "blue",
    "looks_like": "open_air"
  },
  {
    "type": "overmap_terrain",
    "id": [
      "lab_surface_parking_blockA2_roof",
      "lab_surface_parking_blockC0_roof",
      "lab_surface_parking_blockE2_roof",
      "mil_base_1a1",
      "mil_base_1c1",
      "mil_base_1d1",
      "mil_base_1e1",
      "mil_base_1f1",
      "mil_base_1h1",
      "mil_base_1i1",
      "mil_base_1j1",
      "mil_base_2a1",
      "mil_base_2b1",
      "mil_base_2c1",
      "mil_base_2h1",
      "mil_base_2i1",
      "mil_base_2j1",
      "mil_base_2k1",
      "mil_base_3a1",
      "mil_base_3c1",
      "mil_base_3j1",
      "mil_base_3k1",
      "mil_base_4a1",
      "mil_base_4b1",
      "mil_base_4c1",
      "mil_base_4d1",
      "mil_base_4e1",
      "mil_base_4f1",
      "mil_base_4g1",
      "mil_base_4h1",
      "mil_base_4i1",
      "mil_base_4j1",
      "mil_base_5a1",
      "mil_base_5f1",
      "mil_base_5j1",
      "mil_base_5k1",
      "mil_base_6a1",
      "mil_base_6b1",
      "mil_base_6f1",
      "mil_base_6g1",
      "mil_base_6h1",
      "mil_base_6j1",
      "mil_base_6k1",
      "mil_base_7a1",
      "mil_base_7b1",
      "mil_base_7g1",
      "mil_base_7h1",
      "mil_base_7i1",
      "mil_base_7j1",
      "mil_base_7k1",
      "mil_base_8a1",
      "mil_base_8c1",
      "mil_base_8d1",
      "mil_base_8f1",
      "mil_base_8h1",
      "mil_base_8i1",
      "mil_base_8j1",
      "s_gas_g0_roof"
    ],
    "vision_levels": "roof_or_air",
    "copy-from": "generic_air"
  },
  {
    "type": "overmap_terrain",
    "copy-from": "generic_air",
    "id": "hw_railings",
    "vision_levels": "roof_or_air",
    "extend": { "flags": [ "HIGHWAY" ] }
  },
  {
    "type": "overmap_terrain",
    "copy-from": "generic_air",
    "id": [ "special_air", "lab_subway_vent_shaft_roof" ],
    "flags": [ "NO_ROTATE" ]
  },
  {
    "type": "overmap_terrain",
    "copy-from": "generic_air",
    "id": "hw_reserved",
    "//": "Has rotation so cities can judge whether it's running perpendicular/parallel",
    "flags": [ "HIGHWAY_RESERVED", "REQUIRES_PREDECESSOR", "SHOULD_NOT_SPAWN" ]
  },
  {
    "type": "overmap_terrain",
    "id": "hw_reserved_water",
    "copy-from": "hw_reserved",
    "extend": { "flags": [ "RIVER" ] }
  },
  {
    "type": "overmap_terrain",
    "id": "hw_reserved_ramp",
    "//": "for placing adjacent to bridgeheads for z = 1 ramp detection",
    "copy-from": "hw_reserved"
  },
  {
    "type": "overmap_terrain",
    "abstract": "generic_road",
    "copy-from": "road_abstract"
  },
  {
    "type": "overmap_terrain",
    "id": "evac_center_1",
    "copy-from": "road_abstract",
    "sym": "┌"
  },
  {
    "type": "overmap_terrain",
    "id": [
      "evac_center_2",
      "evac_center_3",
      "evac_center_4",
      "evac_center_22",
      "evac_center_24",
      "mil_base_5f",
      "mil_base_5j",
      "mil_base_6j",
      "mil_base_7j"
    ],
    "copy-from": "road_abstract",
    "sym": "─"
  },
  {
    "type": "overmap_terrain",
    "id": "evac_center_5",
    "copy-from": "road_abstract",
    "sym": "┐"
  },
  {
    "type": "overmap_terrain",
    "id": [
      "evac_center_6",
      "evac_center_10",
      "evac_center_11",
      "evac_center_15",
      "evac_center_16",
      "evac_center_20",
      "refctr_S3e",
      "refctr_road",
      "mil_base_road_entrance",
      "mil_base_4b",
      "mil_base_4c",
      "mil_base_4d",
      "mil_base_4e",
      "mil_base_4g",
      "mil_base_4h",
      "mil_base_4i"
    ],
    "copy-from": "road_abstract",
    "sym": "│"
  },
  {
    "type": "overmap_terrain",
    "id": [ "evac_center_23", "mil_base_6f" ],
    "copy-from": "road_abstract",
    "sym": "┬"
  },
  {
    "type": "overmap_terrain",
    "id": [ "evac_center_21", "mil_base_4j" ],
    "copy-from": "road_abstract",
    "sym": "└"
  },
  {
    "type": "overmap_terrain",
    "id": [ "mil_base_4a", "mil_base_4f" ],
    "copy-from": "road_abstract",
    "sym": "├"
  },
  {
    "type": "overmap_terrain",
    "id": "evac_center_25",
    "copy-from": "road_abstract",
    "sym": "┘"
  }
]
