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Estimated Base Flood Elevation (BFE) viewer for property owners, community officials and land developers to identify the flood risk (high, moderate, low), expected flood elevation and estimated flood depth near any property or structure within watersheds where Base Level Engineering has been prepared.
Though we rarely see it spelled out, NAVD stands for National Geodetic Vertical Datum. Current research shows that sea level rise is a real threat, and is one of the reasons that experts predict that severe storms such as Sandy could continue to cause extreme flooding.
People also ask
What does NAVD 88 mean?
How do I convert NGVD 29 elevation to NAVD 88?
What is the average conversion to NAVD 88?
Is NAVD 88 lower than NGVD 29?
To calculate the elevation in NAVD 88, add the conversion factor to the existing elevation. For example, assume the existing elevation in NGVD 29 is 54.25 ft. for the top of bottom floor.
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Nov 4, 2020 · The NAVD 88 used some of the original data from 1929 but also re-leveled about 100,000 km. Originally scheduled to be completed in 1988, it was finished on June 15, 1991. The new datum produced fewer distortions than earlier vertical datums and more accurate elevations, according to Remondi.
NAVD 88 is more compatible with modern surveying and mapping technologies, like Global Positioning Systems (GPS) and Light Detection and Ranging (lidar) data and is more accurate than NGVD 29.
NAVD 1988 is the newer elevation datum. An easy way to convert BFE data is through the National Geodetic Survey (NGS) online tool known as VERTCON. Select this link to view and use the VERTCON site. You can also contact the appropriate floodplain administrator for guidance.
NAVD 88 is the abbreviation for the North American Vertical Datum of 1988. NAVD 88 is one of five current National Geodetic Datums, which are coordinate systems that act as standard reference lines to measure points on the earth’s surface in the region that they apply.
