TCarta Delivers Satellite-Derived Bathymetry to NOAA
TCarta Marine supplied the National Oceanic and Atmospheric Administration (NOAA) with satellite-derived bathymetry (SDB) validated by green laser altimeter data from the NASA ICESat-2 satellite for two U.S. shallow-water coastal areas.
TCarta was the subcontractor on the prime contract awarded to Woolpert, an international geospatial firm headquartered in Dayton, Ohio.
The NOAA pilot focused on two shallow-water regions that were 3,000 sq. km. in total area: one in the Green Bay area of western Lake Michigan and the other around Cape Cod and Nantucket Sound. Both areas experience natural forces that alter the underwater terrain faster than traditional bathymetric surveys can be completed.
TCarta Delivers Satellite-Derived Bathymetry to NOAA for U.S. Coastal Mapping Pilot
May 3, 2021 By Editor
Validated with ICESat-2 Laser Data
DENVER, Colorado, 3 May 2021 – TCarta Marine, a global provider of marine geospatial products, has supplied the National Oceanic and Atmospheric Administration (NOAA) with satellite-derived bathymetry (SDB) validated by green laser altimeter data from the NASA ICESat-2 satellite for two U.S. shallow-water coastal areas.
2m SDB in Nantucket Sound, MA, produced using WorldView satellite imagery with ICESat-2 tracks overlaid.
TCarta was the subcontractor on the prime contract awarded to Woolpert, an international geospatial firm headquartered in Dayton, Ohio.
The NOAA pilot focused on two shallow-water regions that were 3,000 square kilometers in total area – one in the Green Bay area of western Lake Michigan and the other around Cape Cod and Nantucket Sound. Both areas experience natural forces that alter the underwater terrain faster t
NGS revises NOAA report on working in the modernized NSRS
The National Geodetic Survey (NGS) has revised an important technical document on the modernized National Spatial Reference System (NSRS). Zilkoski explores a use case on flood mapping, discussing an Elevation Certificate example, Flood Insurance Rate Map and Flood Insurance Study. NGS has scheduled a webinar for April 8 to discuss the four use case examples.
In February 2021, the National Geodetic Survey (NGS) revised NOAA Technical Report NOS NGS 67
Blueprint for the Modernized NSRS, Part 3: Working in the Modernized NSRS. Users can download the publication. See the box titled “NOAA Technical Report NOS NGS 67.”
NGS releases annual experimental geoid models and gravity interpolation tools
My last column highlighted an ArcGIS web application that incorporates various datasets and data layers to assist surveyors planning vertical control surveys. On Jan, 29, the National Geodetic Survey (NGS) released the latest experimental geoid model, xGeoid20, and a new gravity interpolation tool (see box below, “NGS Releases Annual e& Gravity Interpolation Tools”).
This newsletter will highlight some attributes of these two new products. First, why am I writing about another experimental geoid model. I discussed xGeoid18 in my December 2018 column and xGeoid16 in my June 2017 column. What’s important here is that this will be the last experimental geoid model until 2022, and the dynamic geoid model has also been updated this year in the form of xDGEOID20.