00:00 Overview of Directory structure to put files to load onto the CS20 ,
Geoid gem files go under DATA-GPS-GEOID Subdirectory
Trsf.dat transformation file goes under DBX subdirectory
01:20 Copy files via Windows and check in correct subdirectory on SD or USB
02:15 Transfer Geoid field gem file and Coordinate systems from SD to Internal memory on CS20
03:30 Look at Job and Job Properties to edit Coordinate system, and ensure the Geoidal file is attached, to compute the Orthometric elevation- important to ensure the Gem file is in Internal Memory-system on the cs20 before attaching to the Coordinate system
Set up Coordinate system for Geoid 12 and Geoid18 in Houston these agree within 0.1 ft. Look at Geoid09 compared to GD12 and GD18- Geoid 09 will be different up to 0.7ft in certain area of Houston, so important to know what Geoid model you are using to derive your Orthometric elevations