{ "version": "1.0.0", "lastUpdated": "2026-02-01", "datums": { "JGD2011": { "code": "EPSG:1128", "name": "Japanese Geodetic Datum 2011", "type": "geodetic", "ellipsoid": { "name": "GRS 1980", "code": "EPSG:7019", "semiMajorAxis": 6378137, "inverseFlattening": 298.257222101 }, "primeMeridian": "Greenwich", "remarks": "2011年東日本大震災後に制定。JGD2000から地殻変動を反映。", "history": "JGD2000→JGD2011変換にはNTv2グリッド(touhokutaiheiyouoki2011.par)が推奨", "succeeds": "EPSG:6612" }, "JGD2000": { "code": "EPSG:6612", "name": "Japanese Geodetic Datum 2000", "type": "geodetic", "ellipsoid": { "name": "GRS 1980", "code": "EPSG:7019", "semiMajorAxis": 6378137, "inverseFlattening": 298.257222101 }, "primeMeridian": "Greenwich", "remarks": "2011年以前の日本の測地系。現在はJGD2011への移行を推奨。" }, "TokyoDatum": { "code": "EPSG:6301", "name": "Tokyo", "type": "geodetic", "ellipsoid": { "name": "Bessel 1841", "code": "EPSG:7004", "semiMajorAxis": 6377397.155, "inverseFlattening": 299.1528128 }, "primeMeridian": "Greenwich", "remarks": "旧日本測地系。現在は使用非推奨。変換時は注意が必要。" } }, "geographicCRS": { "EPSG:6668": { "code": "EPSG:6668", "name": "JGD2011", "type": "geographic", "deprecated": false, "coordinateSystem": "ellipsoidal 2D (latitude, longitude)", "areaOfUse": { "description": "Japan - onshore and offshore", "boundingBox": { "north": 46.05, "south": 17.09, "east": 157.65, "west": 122.38 } }, "remarks": "日本全域で使用可能な地理座標系。GPSデータの基準として推奨。測量法で定められた公式測地系。", "useCases": ["data_storage", "data_exchange", "navigation"] }, "EPSG:4612": { "code": "EPSG:4612", "name": "JGD2000", "type": "geographic", "deprecated": true, "supersededBy": "EPSG:6668", "coordinateSystem": "ellipsoidal 2D (latitude, longitude)", "areaOfUse": { "description": "Japan - onshore and offshore", "boundingBox": { "north": 46.05, "south": 17.09, "east": 157.65, "west": 122.38 } }, "remarks": "JGD2000に基づく地理座標系。2011年以降はJGD2011(EPSG:6668)の使用を推奨。", "useCases": ["data_storage"] }, "EPSG:4301": { "code": "EPSG:4301", "name": "Tokyo", "type": "geographic", "deprecated": true, "supersededBy": "EPSG:4612", "coordinateSystem": "ellipsoidal 2D (latitude, longitude)", "areaOfUse": { "description": "Japan - onshore", "boundingBox": { "north": 46.05, "south": 20.37, "east": 154.05, "west": 122.83 } }, "remarks": "旧日本測地系（Tokyo Datum）。現在は非推奨。JGD2011への変換にはTKY2JGDを使用。", "useCases": [] } }, "projectedCRS": { "EPSG:6669": { "code": "EPSG:6669", "name": "JGD2011 / Japan Plane Rectangular CS I", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 129.5, "latitudeOfOrigin": 33.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone I", "prefectures": ["長崎県", "佐賀県"], "boundingBox": { "north": 34.74, "south": 31.15, "east": 131.19, "west": 127.64 } }, "accuracy": { "horizontal": "適用範囲内で1mm未満の歪み", "notes": "中央子午線から約130km以内で最高精度" }, "remarks": "平面直角座標系第I系。長崎県・佐賀県の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6670": { "code": "EPSG:6670", "name": "JGD2011 / Japan Plane Rectangular CS II", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 131.0, "latitudeOfOrigin": 33.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone II", "prefectures": ["福岡県", "熊本県", "大分県", "宮崎県", "鹿児島県"], "boundingBox": { "north": 34.27, "south": 30.19, "east": 132.15, "west": 129.31 } }, "accuracy": { "horizontal": "適用範囲内で1mm未満の歪み", "notes": "中央子午線から約130km以内で最高精度" }, "remarks": "平面直角座標系第II系。九州北部・中部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6671": { "code": "EPSG:6671", "name": "JGD2011 / Japan Plane Rectangular CS III", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 132.166667, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone III", "prefectures": ["山口県", "島根県", "広島県"], "boundingBox": { "north": 37.09, "south": 33.71, "east": 133.44, "west": 130.78 } }, "remarks": "平面直角座標系第III系。中国地方西部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6672": { "code": "EPSG:6672", "name": "JGD2011 / Japan Plane Rectangular CS IV", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 133.5, "latitudeOfOrigin": 33.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone IV", "prefectures": ["香川県", "愛媛県", "徳島県", "高知県"], "boundingBox": { "north": 34.45, "south": 32.71, "east": 134.88, "west": 132.03 } }, "remarks": "平面直角座標系第IV系。四国地方の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6673": { "code": "EPSG:6673", "name": "JGD2011 / Japan Plane Rectangular CS V", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 134.333333, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone V", "prefectures": ["兵庫県", "鳥取県", "岡山県"], "boundingBox": { "north": 36.17, "south": 34.15, "east": 135.47, "west": 133.17 } }, "remarks": "平面直角座標系第V系。中国地方東部・兵庫県の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6674": { "code": "EPSG:6674", "name": "JGD2011 / Japan Plane Rectangular CS VI", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 136.0, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone VI", "prefectures": ["京都府", "大阪府", "福井県", "滋賀県", "三重県", "奈良県", "和歌山県"], "boundingBox": { "north": 36.25, "south": 33.43, "east": 136.99, "west": 134.77 } }, "remarks": "平面直角座標系第VI系。近畿地方・福井県の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6675": { "code": "EPSG:6675", "name": "JGD2011 / Japan Plane Rectangular CS VII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 137.166667, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone VII", "prefectures": ["石川県", "富山県", "岐阜県", "愛知県"], "boundingBox": { "north": 37.86, "south": 34.57, "east": 138.24, "west": 135.77 } }, "remarks": "平面直角座標系第VII系。中部地方北部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6676": { "code": "EPSG:6676", "name": "JGD2011 / Japan Plane Rectangular CS VIII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 138.5, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone VIII", "prefectures": ["新潟県", "長野県", "山梨県", "静岡県"], "boundingBox": { "north": 38.56, "south": 34.58, "east": 140.05, "west": 137.32 } }, "remarks": "平面直角座標系第VIII系。中部地方東部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6677": { "code": "EPSG:6677", "name": "JGD2011 / Japan Plane Rectangular CS IX", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 139.833333, "latitudeOfOrigin": 36.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone IX", "prefectures": [ "東京都", "神奈川県", "千葉県", "埼玉県", "茨城県", "栃木県", "群馬県", "福島県" ], "boundingBox": { "north": 37.97, "south": 34.83, "east": 141.11, "west": 138.4 } }, "accuracy": { "horizontal": "適用範囲内で1mm未満の歪み", "notes": "首都圏での測量に最適。中央子午線から約130km以内で最高精度" }, "remarks": "平面直角座標系第IX系。関東地方・福島県の測量に使用。東京を含む最も利用頻度の高い系。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6678": { "code": "EPSG:6678", "name": "JGD2011 / Japan Plane Rectangular CS X", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 140.833333, "latitudeOfOrigin": 40.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone X", "prefectures": ["青森県", "秋田県", "山形県", "岩手県", "宮城県"], "boundingBox": { "north": 41.56, "south": 37.73, "east": 142.07, "west": 139.35 } }, "remarks": "平面直角座標系第X系。東北地方の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6679": { "code": "EPSG:6679", "name": "JGD2011 / Japan Plane Rectangular CS XI", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 140.25, "latitudeOfOrigin": 44.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XI", "prefectures": ["北海道（西部）"], "boundingBox": { "north": 45.54, "south": 41.34, "east": 141.91, "west": 139.33 } }, "remarks": "平面直角座標系第XI系。北海道西部（小樽・札幌方面）の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6680": { "code": "EPSG:6680", "name": "JGD2011 / Japan Plane Rectangular CS XII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 142.25, "latitudeOfOrigin": 44.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XII", "prefectures": ["北海道（中部）"], "boundingBox": { "north": 45.54, "south": 42.15, "east": 144.26, "west": 140.87 } }, "remarks": "平面直角座標系第XII系。北海道中部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6681": { "code": "EPSG:6681", "name": "JGD2011 / Japan Plane Rectangular CS XIII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 144.25, "latitudeOfOrigin": 44.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XIII", "prefectures": ["北海道（東部）"], "boundingBox": { "north": 46.05, "south": 42.87, "east": 145.87, "west": 143.64 } }, "remarks": "平面直角座標系第XIII系。北海道東部（根室・釧路方面）の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6682": { "code": "EPSG:6682", "name": "JGD2011 / Japan Plane Rectangular CS XIV", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 142.0, "latitudeOfOrigin": 26.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XIV (Ogasawara Islands part 1)", "prefectures": ["東京都（小笠原諸島北部）"], "boundingBox": { "north": 27.79, "south": 26.03, "east": 142.36, "west": 141.2 } }, "remarks": "平面直角座標系第XIV系。小笠原諸島北部の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6683": { "code": "EPSG:6683", "name": "JGD2011 / Japan Plane Rectangular CS XV", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 127.5, "latitudeOfOrigin": 26.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XV (Okinawa main island area)", "prefectures": ["沖縄県（本島周辺）"], "boundingBox": { "north": 27.89, "south": 25.83, "east": 128.38, "west": 126.14 } }, "remarks": "平面直角座標系第XV系。沖縄本島周辺の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6684": { "code": "EPSG:6684", "name": "JGD2011 / Japan Plane Rectangular CS XVI", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 124.0, "latitudeOfOrigin": 26.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XVI (Sakishima Islands)", "prefectures": ["沖縄県（先島諸島）"], "boundingBox": { "north": 25.58, "south": 23.99, "east": 125.52, "west": 122.93 } }, "remarks": "平面直角座標系第XVI系。先島諸島（宮古島・石垣島など）の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6685": { "code": "EPSG:6685", "name": "JGD2011 / Japan Plane Rectangular CS XVII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 131.0, "latitudeOfOrigin": 26.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XVII (Daito Islands)", "prefectures": ["沖縄県（大東諸島）"], "boundingBox": { "north": 26.0, "south": 25.77, "east": 131.35, "west": 130.82 } }, "remarks": "平面直角座標系第XVII系。大東諸島の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6686": { "code": "EPSG:6686", "name": "JGD2011 / Japan Plane Rectangular CS XVIII", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 136.0, "latitudeOfOrigin": 20.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XVIII (Okinotorishima)", "prefectures": ["東京都（沖ノ鳥島）"], "boundingBox": { "north": 20.45, "south": 20.4, "east": 136.11, "west": 136.04 } }, "remarks": "平面直角座標系第XVIII系。沖ノ鳥島の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] }, "EPSG:6687": { "code": "EPSG:6687", "name": "JGD2011 / Japan Plane Rectangular CS XIX", "type": "projected", "deprecated": false, "baseCRS": "EPSG:6668", "projection": { "method": "Transverse Mercator", "centralMeridian": 154.0, "latitudeOfOrigin": 26.0, "scaleFactor": 0.9999, "falseEasting": 0, "falseNorthing": 0 }, "areaOfUse": { "description": "Japan - zone XIX (Minamitorishima)", "prefectures": ["東京都（南鳥島）"], "boundingBox": { "north": 24.32, "south": 24.25, "east": 153.99, "west": 153.94 } }, "remarks": "平面直角座標系第XIX系。南鳥島の測量に使用。", "useCases": ["survey", "area_calculation", "distance_calculation"] } }, "zoneMapping": { "長崎県": { "zone": "I", "code": "EPSG:6669" }, "佐賀県": { "zone": "I", "code": "EPSG:6669" }, "福岡県": { "zone": "II", "code": "EPSG:6670" }, "熊本県": { "zone": "II", "code": "EPSG:6670" }, "大分県": { "zone": "II", "code": "EPSG:6670" }, "宮崎県": { "zone": "II", "code": "EPSG:6670" }, "鹿児島県": { "zone": "II", "code": "EPSG:6670", "notes": "一部離島は系I" }, "山口県": { "zone": "III", "code": "EPSG:6671" }, "島根県": { "zone": "III", "code": "EPSG:6671" }, "広島県": { "zone": "III", "code": "EPSG:6671" }, "香川県": { "zone": "IV", "code": "EPSG:6672" }, "愛媛県": { "zone": "IV", "code": "EPSG:6672" }, "徳島県": { "zone": "IV", "code": "EPSG:6672" }, "高知県": { "zone": "IV", "code": "EPSG:6672" }, "兵庫県": { "zone": "V", "code": "EPSG:6673" }, "鳥取県": { "zone": "V", "code": "EPSG:6673" }, "岡山県": { "zone": "V", "code": "EPSG:6673" }, "京都府": { "zone": "VI", "code": "EPSG:6674" }, "大阪府": { "zone": "VI", "code": "EPSG:6674" }, "福井県": { "zone": "VI", "code": "EPSG:6674" }, "滋賀県": { "zone": "VI", "code": "EPSG:6674" }, "三重県": { "zone": "VI", "code": "EPSG:6674" }, "奈良県": { "zone": "VI", "code": "EPSG:6674" }, "和歌山県": { "zone": "VI", "code": "EPSG:6674" }, "石川県": { "zone": "VII", "code": "EPSG:6675" }, "富山県": { "zone": "VII", "code": "EPSG:6675" }, "岐阜県": { "zone": "VII", "code": "EPSG:6675" }, "愛知県": { "zone": "VII", "code": "EPSG:6675" }, "新潟県": { "zone": "VIII", "code": "EPSG:6676" }, "長野県": { "zone": "VIII", "code": "EPSG:6676" }, "山梨県": { "zone": "VIII", "code": "EPSG:6676" }, "静岡県": { "zone": "VIII", "code": "EPSG:6676" }, "東京都": { "zone": "IX", "code": "EPSG:6677", "notes": "本土部。離島は別系" }, "神奈川県": { "zone": "IX", "code": "EPSG:6677" }, "千葉県": { "zone": "IX", "code": "EPSG:6677" }, "埼玉県": { "zone": "IX", "code": "EPSG:6677" }, "茨城県": { "zone": "IX", "code": "EPSG:6677" }, "栃木県": { "zone": "IX", "code": "EPSG:6677" }, "群馬県": { "zone": "IX", "code": "EPSG:6677" }, "福島県": { "zone": "IX", "code": "EPSG:6677" }, "青森県": { "zone": "X", "code": "EPSG:6678" }, "秋田県": { "zone": "X", "code": "EPSG:6678" }, "山形県": { "zone": "X", "code": "EPSG:6678" }, "岩手県": { "zone": "X", "code": "EPSG:6678" }, "宮城県": { "zone": "X", "code": "EPSG:6678" }, "北海道": { "zone": "XI-XIII", "code": "EPSG:6679", "notes": "西部XI、中部XII、東部XIII" }, "沖縄県": { "zone": "XV-XVII", "code": "EPSG:6683", "notes": "本島XV、先島XVI、大東XVII" } } }