2017 Recorded Webinars
Positioning in a Multi-GNSS World
Jacob Heck, National Geodetic Survey
By 2020, three other complete global navigation satellite systems (GNSS) will be in operation alongside GPS, providing new observables that could improve positioning solutions. This webinar will discuss NGS’ plans on incorporating these newly available signals in its next generation positioning software, which would also be integrated into tools like OPUS.
57 Min
7.1
MB
Deriving High-accuracy Ellipsoid Heights with OPUS-Projects
Dan Gillins, National Geodetic Survey
In the late 1990s, NGS released detailed "height modernization" surveying guidelines for deriving high-accuracy ellipsoid heights on marks with GNSS. In 2013, NGS released OPUS-Projects which is a useful tool for managing static GNSS survey campaigns. This webinar presents empirical research on the accuracy of OPUS-Projects, and presents guidance on the potential use of OPUS-Projects for future height modernization surveys.
54 Min 16
MB
Beta OPUS Projects Quick Start Training
Mark Schenewerk, National Geodetic Survey
Beta OPUS-Projects is a version of OPUS-Projects enhanced to support bluebooking (the common name for preparing survey processing results for publication to the Integrated Database). It performs GPS data processing like OPUS-Projects and will appear largely unchanged; however, bluebooking requires additional information and processing steps.
200 Min
NOAA's Continually Updated Shoreline Product
Doug Graham, National Geodetic Survey
NOAA's Continually Updated Shoreline Product (CUSP) provides the most current tidal-datum referenced shoreline representation of the United States and its territories using NOAA and non-NOAA contemporary sources to update our nation's dynamic shorelines. Shoreline data supports coastal mapping applications and assists decision makers in developing coastal community plans, managing resources, mitigating hazard events, determining sustainable strategies to coastal infrastructures, and conducting environmental analyses to meet our nation's economic, social, and environmental needs.
51 Min
Debriefing the 2017 Geospatial Summit
Various speakers, National Geodetic Survey
On April 24-25, 2017, NGS hosted the 2017 Geospatial Summit to share information about the planned retirement of the North American Datum of 1983 (NAD 83) and the North American Vertical Datum of 1988 (NAVD 88). This webinar recaps the event, discusses stakeholder feedback that NGS received; and highlights resources to stay informed about National Spatial Reference System (NSRS) Modernization activities.
55 Min 3.5
MB
Blueprint for 2022, Part 1: Geometric Coordinates
Dr. Dru Smith, National Geodetic Survey
Since 2008, NGS has been stating that its official policy is to “replace NAD 83”, but details on the exact method have taken years to determine with any certainty. In 2017 this situation changed with the release of NOAA Technical Report NOS NGS 62, entitled “Blueprint for 2022, Part 1: Geometric Coordinates”, which reflect many of the technical and policy decisions NGS has arrived at in their goal to replace NAD 83.
60 Min 6.3
MB
Using GPS to Measure Resiliency of Maryland Wetlands to Sea Level Rise
Philippe Hensel, National Geodetic Survey
Two recently repeated GPS projects on Maryland’s Eastern Shore have suggested that deep subsidence may have a much larger influence on wetland resiliency than was previously assumed. This talk presents preliminary findings from Blackwater Wildlife Refuge and Poplar Island.
48 Min27.9
MB
DSWorld - Basic Features and Functions
Malcolm Archer-Shee, National Geodetic Survey
DSWorld is a PC application for receiving, plotting, and transmitting geodetic control information with the National Geodetic Survey. It uses Google Earth for most of its plotting functions. This is an introductory course covering basic features and functions.
45 Min
Using OPUS-Projects to Submit GPS Surveys to NGS
Mark Schenewerk, National Geodetic Survey
This webinar offers an overview of the preparation of GPS survey results for submission to NGS using beta OPUS-Projects, expected to be released in late April 2017. It focuses on changes from the traditional use of OPUS-Projects and on enhancements to the software, like the ability to perform network horizontal and vertical adjustments using ADJUST.
55 Min 3.9
MB
National Park Service Alaska “GPS on Bench Marks” Projects
Britta Schroeder, National Park Service
The National Park Service partnered with the National Geodetic Survey in 2016 to recover bench marks in Denali National Park and Preserve to support of National Spatial Reference System (NSRS) modernization in 2022. The project included youth programs in geodesy and geographic information systems (GIS).
55 Min 8.1
MB
GRAV-D Update and Experimental Geoid in Alaska
Monica Youngman and Simon Holmes, National Geodetic Survey
Gravity for the Redefinition of the American Vertical Datum (GRAV-D) collects high quality gravity data to support geoid modeling. Learn about recent program activities, upcoming survey plans, and how airborne gravity data and other advances are yielding significant updates to the latest geoid models.
55 Min 18.5
MB
Precise Surveys at Co-located Geodetic Instruments
Charles Geoghegan, National Geodetic Survey
NGS conducts precise surveys at sites with co-located instruments to enhance future realizations of the International Terrestrial Reference Frame (ITRF), the international coordinate system for positioning applications. This presentation will describe the motivation, execution and benefit of these surveys.
46 Min 51.3
MB
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