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  1. National Geodetic Vertical Datum of 1929 - Wikipedia

    Feb 15, 2021 · The National Geodetic Vertical Datum of 1929 is the official name since 1973 of the vertical datum established for vertical control surveying in the United States of America by the General Adjustment of 1929. Originally known as Sea Level Datum of 1929, NGVD 29 was determined and published by the National Geodetic Survey and used to measure the elevation of a point above and depression below mean sea level. NGVD29 was superseded by the North American Vertical Datum of 1988, based upon reference

  2. Vertical datum - Wikipedia

    Feb 17, 2021 · Methods. In common usage, elevations are often cited in height above sea level, although what “sea level” actually means is a more complex issue than might at first be thought: the height of the sea surface at any one place and time is a result of numerous effects, including waves, wind and currents, atmospheric pressure, tides, topography, and even differences in the strength of gravity ...

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  4. The Elevation of Chicago: A Statistical Mystery | Chicago ...

    Feb 18, 2021 · The ground level is about 595 feet. The tower’s antenna is 1730 feet . The floor of the lowest basement is 43 feet below ground level. So the tower ranges from 552 to 2325 feet above sea level. Chicago has 7 buildings over 900 feet tall, giving it a mini mountain range 1500 feet above sea level with higher summits.

  5. Sea level - Wikipedia

    Feb 17, 2021 · Height above mean sea level (AMSL) is the elevation (on the ground) or altitude (in the air) of an object, relative to the average sea level datum.It is also used in aviation, where some heights are recorded and reported with respect to mean sea level (MSL) (contrast with flight level), and in the atmospheric sciences, and land surveying.

  6. List of U.S. states and territories by elevation - Wikipedia

    Feb 10, 2021 · Atlantic Ocean (Caribbean Sea) sea level NA 1,555 ft 474 m Virginia: Mount Rogers: 5,729 ft 1746 m 19 Atlantic Ocean: sea level 950 ft 290 m 5,729 ft 1746 m Washington: Mount Rainier: 14,417 ft 4394 m 4 Pacific Ocean: sea level 1,700 ft 520 m 14,417 ft 4394 m West Virginia: Spruce Knob: 4,863 ft 1482.1 m 24 Potomac River at Virginia border 240 ft

  7. What Is My Elevation? These Best Altitude Altimeter Apps For ...

    Feb 16, 2021 · Altitude is the the measurement of the height you’re in pertaining to the sea level or the ground level. While it’s not important to know your altitude all the time, it can greatly help when ...

  8. The 8 Safest Places in Florida from Hurricanes + Videos ...

    Feb 01, 2021 · Naples Florida- Distance to the coast is 0 miles. Elevation just 3′ above sea level. The Naples area was also hit by a hurricane recently. Ocala- Property and violent crime rates both far higher than the national average.

  9. What is the elevation where you live in Oregon? |

    Jan 26, 2021 · The National Weather Service has a comprehensive list. Elevations range from 25 to 30 feet at Portland International Airport to 1,050 feet at Mount Scott. Why do people always spin out on I-5 near...

  10. Can Fleas Live At Higher Altitudes - Dog Grooming

    Feb 15, 2021 · Fleas are the worst when it comes to dogs. They thrive in virtually all climates, except in extremely cold and extremely dry conditions and at high altitudes.

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