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La. R.S. 50:173.1. Vertical control standards
Vertical controls for all surveys shall be determined in the North American Vertical Datum of 1988 (NAVD88). All measurements shall be referenced to local control stations of the National Spatial Reference System, specifically the public domain Louisiana State...
Are We Sinking? NGA Visits LSU Campus to Measure Subsidence
November 26, 2018 BATON ROUGE, LA – Throughout the month of October, 10 members of the National Geospatial-Intelligence Agency visited LSU’s campus and other statewide GPS sites to take gravity measurements for a research project spearheaded by LSU Center for...
C4G Acquires Geodetic Instruments to Better Understand Subsidence Rates in Louisiana
The Center for GeoInformatics (C4G) in the Department of Civil and Environmental Engineering (CEE) recently received new geodetic instruments to model the Earth’s gravity field. A Scintrex CG-5 Relative Gravity Meter, Leica T60 Total Station, and Trimble R10 GPS Rover...
International Comparison of Absolute Gravimeters (ICAG)
NOAA's Table Mountain Gravity Observatory near Boulder, Colorado, is hosting the International Comparison of Absolute Gravimeters (ICAG) in August and September of 2023. These comparisons, which take place every four years, are certified by the International Bureau of...
In Memoriam: J. Anthony “Tony” Cavell, PLS, CFedS
In Memoriam: J. Anthony “Tony” Cavell, PLS, CFedS Honoring the Legacy of a C4G Cornerstone and Geodetic Visionary J. Anthony “Tony” Cavell, PLS, CFedS"GPSMAN" April 27, 1951 - July 4, 2026Dedicated Leader, Visionary Geodesist, and Cherished Cornerstone of LSU...
Warning in Region C4Gnet Statewide
Subject Start Date End Date Solar Cycle 25 1/8/2025 5/17/2026 We are approaching the peak years of the latest solar cycle (the 25th since the phenomenon was tracked), which will peak in 2025.During this period, space weather events like solar flares and coronal mass...
A Modern Louisiana Geodetic Control Network
Modern society depends on geographic data that is accurately and reliably spatially referenced. In response to this and the decreasing availability of up-to-date traditional control (reference) data LSU C4G & LSRC has initiated and is developing - GULFnet. The initial...
Height Modernization
What is Height Modernization? Height Modernization is the National Oceanic and Atmospheric Administration – National Geodetic Survey (NOAA/NGS) program to facilitate precise elevation measurements using the Global Positioning System to refine these measurements from...
Water Datums
NOAA CO-OPS is the source for Water Datum Data and it can be found on their website Specific questions about Water Datums should be directed to the CO-OPS Datums team at the following email address: nos.coops.datums@noaa.gov Direct links to Louisiana Tide Stations...
What is C4Gnet.XYZ?
The LSU Center for GeoInformatics operates a Virtual Reference Station (VRS) network providing high accuracy GNSS correction signals, serving the Survey, Engineering, Geospatial, GIS/Mapping, Agriculture, and Construction markets. High accuracy GNSS correction signals...