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Tidal Elevation Surveys

Detailed Description

Survey level transit at USGS 01409124 Barnegat Bay at Waretown, New Jersey tide gage site

To ensure accurate readings of tidal elevation for our gages, levels are run annually from deep rods, known and stabilized points surveyed from the National Spatial Reference System, to reference marks established near our gages.  These reference marks are then used to set the elevations for our gages to ensure the most up-to-date elevation information is obtained. With known elevations for our sensors, along with an offset distance unique to that sensor, we can get a tidal elevation relative to a particular coordinate system – NAVD88 in our case.

 

Sources/Usage

Public Domain.

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