Online Adjustment User Services
This new addition to the Geodetic Toolkit allows users to
submit their data to NGS and have it processed by the popular ADJUST
software that performs a least squares adjustment on horizontal, vertical
angle, and/or GPS observations. The utilities includes data checking
programs.
Mapping the
Ionosphere: Modelling the uppermost layers of
the earth's atmosphere is an essential component for accurate and rapid
GPS positioning...
more
The National Readjustment
NGS plans the readjustment of horizontal positions and ellipsoid heights for
GPS stations in the contiguous United States. A new cutoff date for
submittal of projects is announced
Lewis And Clark Bicentennial:
To honor Lewis and Clark's contributions to mapping, NGS is installing
a series of commemorative markers along the route that Lewis and Clark
traveled.
Project Proposals:
Data and advice to help you plan your geodetic control surveys.
VDatum Utility:
VDatum is a tool for the conversion of elevation data among 28 different
vertical datums...more
State Population Centers:
NGS encourages each state to set a commemorative
geodetic control monument at the location of its population center as determined by the 2000 U.S. Census.