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日本の北端・東端・西端・南端のWebメルカトル(3857)座標

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仕事で必要になったときにすぐ出てこなかったので。
変換にはPostGISを使用

  • 北端(JGD2000(GRS80楕円体)経度緯度:4612 → Webメルカトル:3857)
    -- 択捉島・カモイワッカ岬(北海道蘂取郡蘂取村 北緯45度33分28秒 東経148度45分14秒)
SELECT ST_AsText(
  ST_Transform(ST_GeomFromText('POINT(148.75388889 45.55777778)', 4612), 3857)
);
---> "POINT(16559207.164754 5709763.80144174)"
  • 東端(JGD2000(GRS80楕円体)経度緯度:4612 → Webメルカトル:3857)
    -- 南鳥島・坂本崎(東京都小笠原村 北緯24度17分12秒 東経153度58分50秒)
SELECT ST_AsText(
  ST_Transform(ST_GeomFromText('POINT(153.98055556 24.28666667)', 4612), 3857)
);
---> "POINT(17141037.0370046 2788378.80177753)"
  • 西端(JGD2000(GRS80楕円体)経度緯度:4612 → Webメルカトル:3857)
    -- 与那国島・西崎(沖縄県八重山郡与那国町 北緯24度26分58秒 東経122度56分01秒)
SELECT ST_AsText(
  ST_Transform(ST_GeomFromText('POINT(122.93361111 24.44944444)', 4612), 3857)
);
---> "POINT(13684906.9901435 2808271.29464826)"
  • 南端(JGD2000(GRS80楕円体)経度緯度:4612 → Webメルカトル:3857)
    -- 沖ノ鳥島・北小島(東京都小笠原村 北緯20度25分30.6585秒 東経136度4分11.1766秒 )
SELECT ST_AsText(
  ST_Transform(ST_GeomFromText('POINT(136.06972222 20.425)', 4612), 3857)
);
---> "POINT(15147212.1899126 2323446.56066348)"

参照 : 日本の端の一覧

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