Search Results - Above sea level
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The term above mean sea level ( AMSL) refers to the elevation (on the ground) or altitude (in the air) of any object, relative to the average sea level datum. AMSL is used extensively in radio (both in broadcasting and other telecommunications uses) by engineers to determine the coverage area a station will be able to reach. It is also used in aviation, where all heights are recorded and reported with respect to AMSL (though also see flight level), and in the atmospheric sciences. The concept of a "mean sea level" is in itself rather artificial, because it is not possible to determine a figure for mean sea level for the entire planet, and it varies quite a lot even on a much smaller scale. This is because the sea is in constant motion, affected by the high and low pressure zones above it, the tides, local gravitational differences, and so forth. The best one can do is to pick a spot and calculate the mean sea level at that point and use it as a datum. For example, the Ordnance Survey uses a height datum based on the measurements of mean sea level at a particular gauge at Newlyn, Cornwall from 1915 to 1921[1] for their maps of Great Britain, and this datum is actually some 80&_160;cm different from the mean sea level reading obtained on the other side of the country. An alternative is to base height measurements on an ellipsoid of the entire earth, which is what systems such as GPS do. In aviation, the ellipsoid known as World Geodetic System 84 is increasingly used to define mean sea level. Another alternative is to use a geoid based datum such as NAVD88. When referring to geographic features such as mountains on a topographic map, variations in elevation are shown by contour lines. The elevation of a mountain denotes the highest point or summit and is typically illustrated as a small circle on a topo map with the AMSL height shown in either meters or feet or both. The height above average terrain (HAAT) for a station is determined from topographic maps by averaging the elevation AMSL at points along several radials or radii. This is subtracted from the elevation AMSL of the antenna, including both the tower itself and the ground it is on, to determine the difference. Negative numbers for HAAT sometimes result from this when the station or airport is in a valley, which is significantly lower AMSL than the surrounding mountains. In the rare case that a location is below sea level, AMSL itself is a negative number. For one such case see Amsterdam Schiphol Airport.
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Showing 1 to 9 of 9 Articles matching 'Above sea level' in related articles. |
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1. Discover the Lifetime Experience of Trekking amidst the Serenity of Dodital
November 18, 2009
India is one of the very few countries that have numerous destinations for trekking and other adventurous activities. One of them is Dodital, which is surrounded by lush greenery & crystal clear water. Dodital is located at an elevation of 3024 meters above mean sea level, in the north of Uttarakashi; thus holds potential for adventure sports.
Apart from a display of natural beauty there is an array of diversity in culture and heritage for which India is known for ages. Travelers in course of their voyages and trekking expeditions, have opportunity to interact with the villagers coming f... (read more)
Author: Subhash Kandpal
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2. Aspen Nightlife And The Altitude
November 16, 2009
There is more to do in Aspen than ski! The Aspen nightlife is like nothing you will experience elsewhere. The warmth and camaraderie of all of the skiers, from all of the different lodges is quite special, and remarkable. You will have a good time in Aspen, no matter what you choose to do, but there is one thing that you should be very aware of before you start your party the altitude. Aspen sits about 8000 feet above sea level. Unless you live in a high altitude area, you will need to adjust to this altitude. You may find yourself feeling dizzy or light headed, and you may even find it a bit ... (read more)
Author: Al kaleb
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3. The Famous Guatemala Antigua Coffee
November 16, 2009
In the high altitudes of Guatemala lies the origin of Guatemala Antigua Coffee. This perfectly situated growing land is 3000 feet above sea level and located between three volcanoes. These volcanoes have indirectly contributed to the minerals and nutrients of the land around them, making them the ideal place to cultivate coffee plants. The taste of the coffee is smooth, mild and the flavor is balanced by the chocolaty touch present in the coffee. Some of the coffee lovers find the bitterness of this coffee a bit too high but most of them are fascinated by the fragrance of cocoa in it. The ... (read more)
Author: Chris Cornell
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4. When to go and where to stay in Paris
November 12, 2009
Paris when to go and where to stay
Paris is the capital of France and the country's most populous city. Paris is located in the north-bending arc of the river Seine and includes two islands, the Île Saint-Louis and the larger Île de la Cité, which form the oldest part of the city. Overall, the city is relatively flat, and the lowest elevation is 35 m (115 ft) above sea level. Paris has several prominent hills, of which the highest is Montmartre at 130 m (427 ft).
Paris has an oceanic climate and has warm and pleasant summers with average high temperatures of 25 °C (77 °F) and low o... (read more)
Author: clare westwood
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5. The Dead Sea is Dying
November 12, 2009
A fresh glass of cool, clear water is, in some places of the world, an expensive luxury. For example, take the Dead Sea in the southern part of Israel. It is one of the most unique places on earth. First, at 1385 feet below sea level, it is the lowest place above water on the earth. Water cannot flow out so only through evaporation can water escape, leaving behind the dissolved salts and minerals brought in by the Jordan River and other tributaries. It is Israel’s and Jordan’s mineral and salt waste deposit.
The Dead Sea is 8.6 times saltier than the oceans, making it the second saltie... (read more)
Author: Thelma Oliver
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6. Kasauli-The Heaven on Earth
November 05, 2009
Kasauli ,a beautiful small hillstation in the state of Himachal Pradesh is just about 330 km from Delhi and is situated at an altitude of 1925m above sea level. The convenient Time to visit this Hill Station is betweenApril to September.When you gaze at Kasauli you will experience that you have been taken into the time of British. The place appears to have preserved its beauty, without being influenced by the modern lifestyle to a great extent. The cemented roads, old-fashioned shops, traditional houses with majestic portico and small orchards, all strike a chord you of the time when the count... (read more)
Author: alivia martin
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7. Highlands, NC Statistically Speaking
October 31, 2009
Highlands, NC can be found in the lower southwestern tip of the state. The name Highlands speaks for itself. This quaint little hospitality is located in the lower Appalachian Mountains and rests around 4,118 feet above sea level. This gives Highlands the distinction of being one of the most elevated little towns in the eastern half of the United States. This popular getaway location is right at home in the Nantahala National Forest. The scenic beauty surrounding Highlands attracts nature lovers from all over the land. There truly is something for everyone in Highlands.
Located in M... (read more)
Author: Martin Najbrt
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8. A Long Walk Up Ben Nevis
October 29, 2009
Ben Nevis is the highest mountain in Scotland; its peak rises over 1300 meters above sea level. Walking Ben Nevis is a breath taking experience in many ways. The path begins at sea level and trekking up to the top is an event that is well worth the effort.
If you are new to this type of sport it is advised that you stick to the path going up and coming back. The Scottish weather can change at any second leaving you immersed in fog and searching for your footing.
Make sure you have your camera ready at all times. As you ascend the mountain the views are awesome and stopping to snap a... (read more)
Author: Sarah James
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9. Mussoorie - a small city in the lap of nature
October 26, 2009
Mussoorie is commonly referred to as the Queen of Hills. This pleasant hill station is located at a distance of 34kms from Dehradun at an altitude of 2,003mts above sea level in the Garhwal hills. Mussoorie is one the most picturesque hill stations in India. It is frequently visited by both Indians as well as foreign nationals. It provides superb treatment to those who want relief from the hot sultry conditions of the plains. It is close enough to the capital city Delhi, to make just a weekend trip. Also, key Hindu pilgrimage places like Kedarnath, Badrinath, Gangotri, Yamunotri, Haridwar, and... (read more)
Author: alivia martin
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