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  1. Glossary - NOAA Shoreline Website

    shoreline.noaa.gov › glossary

    mean sea level (MSL) A tidal datum. The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g., monthly mean sea level and yearly mean sea level. (NOS CO-OPS 1 2000) mean tide level. Same as half tide level. (NOS CO-OPS 1 2000) mean low tide

  2. Mount Adams (Washington) - Wikipedia

    en.wikipedia.org › wiki › Mount_Adams_(Washington)

    Although snowfall is not measured directly, it can be estimated from the snow depth; and since the Potato Hill station was upgraded to report daily snow depth in 2006, there has been an average of 214 inches (540 cm) of snow every year. Also since 2006, the most snow to fall in a day was 28 inches (71 cm) (Feb 26, 2011), in a month, 92 inches ...

  3. Mount Hood - Wikipedia

    en.wikipedia.org › wiki › Mount_Hood

    Eliot Glacier is the largest glacier by volume at 73,000 acre feet (0.09 km 3), and has the thickest depth measured by ice radar at 361 feet (110 m). The largest glacier by surface area is the Coe-Ladd Glacier system at 531 acres (215 ha). Glaciers and snowfields cover about 80 percent of the mountain above the 6,900-foot (2,100 m) level.

  4. Climate adaptation follies. Part II: scenarios of future sea ...

    judithcurry.com › 2021/03/08 › climate-adaptation

    Mar 08, 2021 · When based on the trends since 1980, there is 3.51 inches (0.29 feet) of sea level rise at Atlantic City during the period 2000-2020. Reaching 9.6 inches (0.8 feet) by 2030 (the Rutgers scenario with 50% chance) would require a very substantial acceleration for the remainder of the 2020’s.

  5. The elevation of the base flood, including wave height, relative to the National Geodetic Vertical Datum (NGVD), North American Vertical Datum (NAVD) or other datum specified on the Flood Insurance Rate Map (FIRM). [BS] BASEMENT (for flood loads). The portion of a building having its floor subgrade (below ground level) on all sides.

  6. Lesson 7: Static Global Positioning System Surveying

    www.e-education.psu.edu › geog862 › print

    Apr 23, 2007 · Another category is Posted, which indicates that the station was adjusted after the general NAVD adjustment in 1991. When a station’s elevation has been found by precise leveling but non-rigorous adjustment, it is called Computed. Stations’ vertical values are given to 1 decimal place if they are from GPS/GNSS observation (Obs) or vertical ...

  7. The elevation of the base flood, including wave height, relative to the National Geodetic Vertical Datum (NGVD), North American Vertical Datum (NAVD) or other datum specified on the Flood Insurance Rate Map (FIRM). BASEMENT. The portion of a building having its floor subgrade (below ground level) on all sides. DESIGN FLOOD.

  8. GEN 1.7 Differences From ICAO Standards, Recommended ...

    www.faa.gov › air_traffic › publications

    In U.S. domestic airspace, “transition altitude,” “layer” and “level” are not used; however, in the U.S., flight levels begin at FL 180 where the reference datum of 29.92 inches of mercury is used as the constant atmospheric pressure. Below FL 180, altitudes are based on barometric pressure readings.

  9. (33) In no event shall building height exceed 324 feet above sea level, based on North American Vertical Datum, 1988 (NAVD – 88). (34) Maximum building height south of the F3 Land Use District Separation Line shall be 135 feet, with structural elements not intended for habitation above 135 feet, so long as structural elements do not exceed ...

  10. USGS Water Resources NSDI Node

    water.usgs.gov › lookup › getgislist

    Spatial Data Sets Available on the USGS Water Mission Area NSDI Node All data on the Water Mission Area NSDI Node are free to the public. When using data, photographs and maps produced by the U.S. Geological Survey, the USGS requests that reference to or courtesy of the U.S. Geological Survey be noted.

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