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If the latitude in the northern hemisphere is 48º50' or smaller, it is possible to view both astronomical dawn and dusk every day of the month of July. At the latitude of 48°33′38.58804” North, which is about 62.3 km (38.7 mi) north of this parallel, is the parallel where twilight/nighttime boundary on the June Solstice. [1]
Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.
The 45th parallel north is often called the halfway point between the equator and the North Pole, but the true halfway point is 16.0 km (9.9 mi) north of it (approximately between 45°08'36" and 45°08'37") because Earth is an oblate spheroid; that is, it bulges at the equator and is flattened at the poles. [1]
At this latitude the sun is visible for 15 hours, 1 minute and 28 seconds during the summer solstice and 9 hours, 20 minutes during the winter solstice. [1] On 21 June, the maximum altitude of the sun is 73.44 degrees, while it is 26.56 degrees on 21 December. [citation needed]
The 42nd parallel north is a circle of latitude that is 42 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is visible for 15 hours, 15 minutes during the summer solstice and 9 hours, 6 minutes during the winter ...
4.2 Location map many, using default map (image) 4.3 Location map+, using default map (image) 5 See also. Toggle See also subsection. 5.1 Location map templates.
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The 49th parallel north is a circle of latitude that is 49° north of Earth's equator. It crosses Europe , Asia , the Pacific Ocean , North America , and the Atlantic Ocean . The city of Paris is about 15 km (9 mi) south of the 49th parallel and is the largest city between the 48th and 49th parallels.