17th parallel north 17th parallel north The 17th parallel north is a circle of latitude that is 17 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, Central America, the Caribbean and the Atlantic Ocean. The parallel is particularly significant in the history of Vietnam (see below). At this latitude the sun is visible for 13 hours, 9 minutes during the summer solstice and 11 hours, 7 minutes during the winter solstice. Starting at the Prime Meridian and heading eastwards, the parallel 17° north passes through: The Seventeenth parallel () was the provisional military demarcation
49th parallel north the 1846 Oregon Treaty. This agreement divided the Oregon Country between British North America and the United States by extending the 49th parallel boundary to the west coast, ending in the Strait of Georgia; it then circumvents Vancouver Island through Boundary Pass, Haro Strait, and the Strait of Juan de Fuca. This had the side effect of isolating Point Roberts, Washington. Although parts of Vancouver Island and parts of Eastern Canada are south of the 49th parallel, and parts of the United States (Alaska, Northwest Angle) are north of it, the term "49th parallel" is sometimes used metonymically to refer