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The extreme points of British Columbia are four in number: *Mount Jetté, also legally described as Boundary Peak 177, which lies just inside the apex of the joint boundaries of British Columbia, Yukon and the US state of Alaska, at . US coordinates for the same summit are . The International Boundary Commission (IBC) defines "boundary point 177" as .〔(【引用サイトリンク】publisher= International Boundary Commission )〕 The actual extreme point is where a line extending northwest from that summit reaches the 60th Parallel north, which is the limit of British Columbia, en route to the 141st line of longitude, which is the boundary between Yukon and Alaska. *at the intersection of the 60th Parallel N and the 120th Meridian West, which is the intersection of the boundaries of the Northwest Territories, British Columbia, and Alberta, north of the headwater area of the Petitot River, a tributary of the Liard (). *Forum Peak, which lies just north of the apex of the joint boundaries of British Columbia, Alberta, and the US state of Montana, and at the southwest corner of Waterton Lakes National Park, at . The actual extreme point lies just southeast of that summit, where the Continental Divide crosses the United States-Canada border. That point is marked by boundary monument 272, at . *the southernmost extremity is a point in the Strait of Juan de Fuca at ,〔(【引用サイトリンク】publisher= International Boundary Commission )〕 due south of Christopher Point which is the southernmost tip of Vancouver Island, at .〔("Christopher Point" in BCGNIS )〕 The southernmost land extremity is the southernmost point of land in the Race Rocks, which comprise an offshore ecological reserve, at .〔("Race Rocks" in BCGNIS )〕 ==Other notable boundary points== *The 49th Parallel boundary dividing the Mainland from the United States terminates in the middle of the Strait of Georgia southwest of the Tsawwassen Ferry Terminal, at .〔 *The northern marine boundary of British Columbia is the A-B Line, established by the Alaska Boundary Settlement of 1903, drawn from Point A to Point B. Point A is near Cape Muzon, the southern tip of Dall Island, Alaska, at .〔(【引用サイトリンク】publisher= International Boundary Commission )〕 Point B is a point in the waters of Chatham Sound, on roughly the same line of latitude, at the south end of Tongass Passage, which separates Tongass Island, Alaska, from Wales Island, at .〔 *The southernmost point of the land border between Alaska and British Columbia is on the shoreline between Stewart, British Columbia and Hyder, Alaska at Eagle Point, which is the western tip of the estuary of the Salmon River as it enters the head of the Portland Canal, at . Eagle Point is the location of Boundary Monument 1, as ordered by the Alaska Boundary Tribunal.〔("Eagle Point" in BCGNIS )〕〔(BC Basemap Online )〕 *The British Columbia-Alberta border diverges from the 120th Meridian at Intersection Mountain, (the actual summit of Intersection Mountain is at ). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Extreme points of British Columbia」の詳細全文を読む スポンサード リンク
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