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7 Creating and Loading a Geoid Separation File for SurvCE
7.1 Geoid File
GNSS receivers measure Ellipsoid Height; however, users typically need Orthometric Heights.
The Geoid Separation File (GSF) is a file organized as a grid of height differences. Field data collection tools like
SurvCE use the GSF file to derive an orthometric height at a Latitude - Longitude - Ellipsoid height from the ellipsoid.
It is very important that you survey with a GSF loaded for medium sized jobs (job extending over a linear distance of
1000 meters)
Every three to five years, the National Geodetic Survey (NGS) produces a new Geoid realization for the United States.
The most recent GEOID is Geoid12B.
7.2 Geoid Tools
Carlson SurvCE includes a Carlson XPort license number. You can download the latest XPort tool here:
http://www.carlsonsw.com/support/software-downloads/?product=SurvCE
Typically the XPortSetup tool is button number 1:
Summary of Contents for Stonex S4II
Page 34: ...34 SurvCE should now show the selected head as the Device 9 Click on the Receiver tab...
Page 51: ...51 3 Select the green check mark Wait a moment while the Data Collector adds the new point...
Page 55: ...55 13 Next go to File tab and click on 3 Points to view the list of adjusted points...
Page 57: ...57 2 Go to the File tab and click on 7 Import Export 3 Select Export Ascii File...
Page 65: ...65 Enter your Network key the Wi Fi Password presented on the phone 12 Click Next...
Page 78: ...78 7 Click Next 8 Enter Network key which is the wifi password then click Next...
