Aug 31, 2018 1:00 PM EDT
In 2022, the National Geodetic Survey (NGS) will
replace all components of the National Spatial Reference System (NSRS),
including NAD 83 and NAVD 88, with a new system that is geocentric,
time-dependent and not reliant upon passive control. Every survey, map or
geolocation created today will be incompatible with the new system by as much
as 4 meters, depending on where in the United States you are working. This
misalignment could apply to every latitude and/or longitude and/or height in
your work.
In order to assist users in understanding and
adapting to the new system, two technical reports were released by NGS in 2017,
under the title “Blueprint for 2022”, with a third, companion report in the
works. The first two reports provide the scientific and definitional aspects of
four new time-dependent terrestrial reference frames and their companion
“geopotential datum” (replacing and expanding upon the historic concept of a
“vertical datum”). The third report will focus on the user community and how it
can work within this new paradigm of time-dependent geodetic control.
This talk will focus on all of the changes to
expect in the future and ways that all geospatial professionals can adapt and
thrive in the new system.
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David Alvarez
“THE FURTHER BACKWARDS YOU LOOK, THE FURTHER FORWARD YOU CAN SEE"
Winston Churchill