{
  "version": 1,
  "about": "Named map regions shared by Relief and any app that wants the same frames. 'design' is the hand-written input; 'extent', 'bbox' and 'size_km' are derived by `uv run python scripts/regions.py sync`. All coordinates in 'extent' are projected metres in the region's own CRS (x0, y0, x1, y1); 'bbox' is lon/lat (west, south, east, north).",
  "regions": [
    {
      "id": "vestland",
      "name": "Vestland (proof of concept)",
      "description": "Bergen coast: fjords, skerries and the Norwegian Trench. The hardest generalisation case.",
      "crs": {
        "code": "EPSG:25832",
        "name": "ETRS89 / UTM zone 32N",
        "proj4": "+proj=utm +zone=32 +ellps=GRS80 +units=m +no_defs +type=crs",
        "epsg": 25832
      },
      "design": {
        "lonlat_box": [
          3.5,
          59.0,
          7.5,
          61.5
        ],
        "fit": "inner"
      },
      "fetch": {
        "step_deg": 0.0010416666666666667,
        "legacy": true
      },
      "lods": {
        "overview": {
          "cell": 1000
        },
        "regional": {
          "cell": 250
        },
        "detail": {
          "cell": 125
        }
      },
      "extent": [
        207460,
        6553058,
        413826,
        6819400
      ],
      "bbox": [
        3.5,
        59.0,
        7.5,
        61.5
      ],
      "size_km": [
        206,
        266
      ],
      "built": true,
      "bathymetry": "shelf"
    },
    {
      "id": "north_sea",
      "name": "North Sea (Norwegian sector and neighbours)",
      "description": "Norwegian North Sea (Sodir blocks 1/2 to 35/x) with the UK, Danish, German and Dutch margins as context. North edge 0.5 degrees above the 62 N boundary with the Norwegian Sea.",
      "crs": {
        "code": "EPSG:25832",
        "name": "ETRS89 / UTM zone 32N",
        "proj4": "+proj=utm +zone=32 +ellps=GRS80 +units=m +no_defs +type=crs",
        "epsg": 25832
      },
      "design": {
        "lonlat_box": [
          -1.0,
          55.0,
          10.5,
          62.5
        ],
        "fit": "outer"
      },
      "fetch": {
        "step_deg": 0.004166666666666667,
        "sea": [
          "emodnet",
          "etopo"
        ],
        "land": [
          "copernicus",
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 2000
        },
        "regional": {
          "cell": 900
        },
        "detail": {
          "cell": 300
        }
      },
      "coverage": {
        "sodir_blocks": {
          "include": [
            "North sea"
          ],
          "min_area_inside": 0.99
        },
        "sodir_fields": {
          "include": [
            "North sea"
          ],
          "min_area_inside": 1.0
        }
      },
      "extent": [
        -140000,
        6090000,
        600000,
        6970000
      ],
      "bbox": [
        -3.409,
        54.54,
        10.974,
        62.87
      ],
      "size_km": [
        740,
        880
      ],
      "built": true,
      "bathymetry": "shelf"
    },
    {
      "id": "norwegian_sea",
      "name": "Norwegian Sea",
      "description": "Sodir Norwegian Sea blocks (62 N to 68.6 N) and the Nordland coast, in a Lambert conformal conic centred on 8 E so the coast does not lean.",
      "crs": {
        "code": "+proj=lcc +lat_1=62 +lat_2=70 +lat_0=66 +lon_0=8 +x_0=0 +y_0=0 +ellps=GRS80 +units=m +no_defs",
        "name": "Relief Norwegian Sea LCC (8 E)",
        "proj4": "+proj=lcc +lat_0=66 +lon_0=8 +lat_1=62 +lat_2=70 +x_0=0 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs",
        "epsg": null
      },
      "design": {
        "lonlat_box": [
          -3.0,
          61.5,
          17.0,
          70.0
        ],
        "fit": "outer"
      },
      "fetch": {
        "step_deg": 0.004166666666666667,
        "sea": [
          "emodnet",
          "etopo"
        ],
        "land": [
          "copernicus",
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 2000
        },
        "regional": {
          "cell": 1000
        },
        "detail": {
          "cell": 400
        }
      },
      "coverage": {
        "sodir_blocks": {
          "include": [
            "Norwegian sea"
          ],
          "min_area_inside": 0.99
        },
        "sodir_fields": {
          "include": [
            "Norwegian sea"
          ],
          "min_area_inside": 1.0
        }
      },
      "extent": [
        -590000,
        -510000,
        480000,
        490000
      ],
      "bbox": [
        -7.435,
        60.946,
        20.645,
        70.41
      ],
      "size_km": [
        1070,
        1000
      ],
      "built": true,
      "bathymetry": "ocean",
      "levels": {
        "sea": [
          0,
          200,
          500,
          1000,
          1500,
          2000,
          2500,
          3000,
          3500,
          4000,
          4500,
          5000,
          5500,
          6000
        ]
      }
    },
    {
      "id": "barents_sea",
      "name": "Barents Sea and surroundings (north polar, Norway at the bottom)",
      "description": "Barents Sea from northern Norway and the Kola Peninsula to Svalbard and Novaya Zemlya, in a north-polar Lambert azimuthal equal-area projection centred on 30 E: the 30 E meridian runs straight down, so Finnmark and the Norwegian coast sit at the bottom of the map.",
      "crs": {
        "code": "+proj=laea +lat_0=90 +lon_0=30 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs",
        "name": "Relief Barents polar LAEA (30 E down)",
        "proj4": "+proj=laea +lat_0=90 +lon_0=30 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs",
        "epsg": null
      },
      "design": {
        "points": [
          [
            13.0,
            68.2
          ],
          [
            19.0,
            69.7
          ],
          [
            25.8,
            71.2
          ],
          [
            31.0,
            70.4
          ],
          [
            33.0,
            68.9
          ],
          [
            41.0,
            67.1
          ],
          [
            44.0,
            68.5
          ],
          [
            10.5,
            79.7
          ],
          [
            22.0,
            80.5
          ],
          [
            31.0,
            80.2
          ],
          [
            53.0,
            70.7
          ],
          [
            68.5,
            77.1
          ],
          [
            68.0,
            73.0
          ],
          [
            20.0,
            66.5
          ]
        ],
        "margin_m": 100000,
        "round_m": 50000,
        "fit": "outer"
      },
      "fetch": {
        "step_deg": 0.008333333333333333,
        "sea": [
          "emodnet",
          "etopo"
        ],
        "land": [
          "copernicus",
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 4000
        },
        "regional": {
          "cell": 2000
        },
        "detail": {
          "cell": 800
        }
      },
      "coverage": {
        "sodir_blocks": {
          "include": [
            "Barents sea"
          ],
          "min_area_inside": 0.99
        },
        "sodir_fields": {
          "include": [
            "Barents sea"
          ],
          "min_area_inside": 1.0
        }
      },
      "extent": [
        -850000,
        -2700000,
        1300000,
        -900000
      ],
      "bbox": [
        -13.373,
        62.89,
        85.315,
        81.945
      ],
      "size_km": [
        2150,
        1800
      ],
      "built": true,
      "bathymetry": "shelf"
    },
    {
      "id": "ne_europe",
      "name": "NE Europe (UK, Norwegian North Sea, Germany, Poland)",
      "description": "Hydrocarbon provinces of the UK, the Norwegian North Sea, Denmark, the Netherlands, Germany and Poland, in ETRS89 LAEA. North edge follows the 62 N Sodir boundary with the Norwegian Sea (pinned to it at 3 E, because a rectangle cannot follow a curved parallel); Norwegian Sea fields and blocks are out. West edge reaches 12 W to include Rockall and West of Shetland; onshore Poland and Germany are framed from basin knowledge, not data (EMODnet wells are offshore only).",
      "crs": {
        "code": "EPSG:3035",
        "name": "ETRS89 / LAEA Europe",
        "proj4": "+proj=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000 +ellps=GRS80 +units=m +no_defs +type=crs",
        "epsg": 3035
      },
      "design": {
        "lonlat_box": [
          -6.0,
          48.0,
          24.5,
          62.0
        ],
        "fit": "outer",
        "north_at": [
          62.0,
          3
        ]
      },
      "fetch": {
        "step_deg": 0.008333333333333333,
        "sea": [
          "emodnet",
          "etopo"
        ],
        "land": [
          "copernicus",
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 4000
        },
        "regional": {
          "cell": 2000
        },
        "detail": {
          "cell": 800
        }
      },
      "coverage": {
        "sodir_blocks": {
          "include": [
            "North sea"
          ],
          "exclude": [
            "Norwegian sea",
            "Barents sea"
          ],
          "min_area_inside": 0.99,
          "max_excluded_area_inside": 0.01
        },
        "sodir_fields": {
          "include": [
            "North sea"
          ],
          "exclude": [
            "Norwegian sea",
            "Barents sea"
          ],
          "min_area_inside": 1.0,
          "max_excluded_area_inside": 0.0
        },
        "wells": {
          "countries": [
            "United Kingdom",
            "Netherlands",
            "Denmark",
            "Germany",
            "Poland"
          ],
          "min_inside": 0.99
        }
      },
      "extent": [
        3130000,
        2760000,
        5400000,
        4340000
      ],
      "bbox": [
        -12.018,
        46.801,
        30.063,
        62.172
      ],
      "size_km": [
        2270,
        1580
      ],
      "built": true,
      "bathymetry": "shelf"
    },
    {
      "id": "atlantic",
      "name": "Atlantic Ocean (spreading ridges)",
      "description": "The Atlantic from the Arctic to the Southern Ocean in a Lambert azimuthal equal-area view centred on 25 W, drawn on the ocean depth scale: the Mid-Atlantic Ridge, its flanks, fracture zones and the abyssal plains show as steady steps in colour from 2,000 to 6,000 m.",
      "crs": {
        "code": "+proj=laea +lat_0=5 +lon_0=-25 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs",
        "name": "Relief Atlantic LAEA (25 W)",
        "proj4": "+proj=laea +lat_0=5 +lon_0=-25 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs",
        "epsg": null
      },
      "design": {
        "lonlat_box": [
          -85.0,
          -62.0,
          25.0,
          72.0
        ],
        "fit": "outer"
      },
      "bathymetry": "ocean",
      "levels": {
        "sea": [
          0,
          200,
          500,
          1000,
          1500,
          2000,
          2500,
          3000,
          3500,
          4000,
          4500,
          5000,
          5500,
          6000
        ],
        "land": [
          0,
          200,
          500,
          1000,
          1500,
          2500,
          3500,
          4500
        ]
      },
      "fetch": {
        "step_deg": 0.016666666666666666,
        "sea": [
          "etopo"
        ],
        "land": [
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 20000
        },
        "regional": {
          "cell": 10000
        },
        "detail": {
          "cell": 5000
        }
      },
      "extent": [
        -6390000,
        -7520000,
        5400000,
        7560000
      ],
      "bbox": [
        -138.308,
        -67.555,
        78.063,
        77.919
      ],
      "size_km": [
        11790,
        15080
      ],
      "built": true
    },
    {
      "id": "world",
      "name": "World (Equal Earth)",
      "description": "Whole world in Equal Earth (EPSG:8857) for locator maps and global context.",
      "crs": {
        "code": "EPSG:8857",
        "name": "WGS 84 / Equal Earth Greenwich",
        "proj4": "+proj=eqearth +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs",
        "epsg": 8857
      },
      "design": {
        "world": true
      },
      "fetch": {
        "step_deg": 0.08333333333333333,
        "sea": [
          "etopo"
        ],
        "land": [
          "etopo"
        ]
      },
      "lods": {
        "overview": {
          "cell": 20000
        },
        "regional": {
          "cell": 10000
        }
      },
      "extent": [
        -17243959,
        -8392928,
        17243959,
        8392928
      ],
      "bbox": [
        -180.0,
        -90.0,
        180.0,
        90.0
      ],
      "size_km": [
        34488,
        16786
      ],
      "built": true,
      "bathymetry": "ocean",
      "levels": {
        "sea": [
          0,
          200,
          500,
          1000,
          1500,
          2000,
          2500,
          3000,
          3500,
          4000,
          4500,
          5000,
          5500,
          6000
        ],
        "land": [
          0,
          200,
          500,
          1000,
          1500,
          2500,
          3500,
          4500
        ]
      }
    }
  ]
}