The VERTCON 3.0 Project : Creating vertical transformations for points in the National Spatial Reference System, including VERTCON 3.0 release 20190601

The report details how data were pre‐processed, analyzed, plotted, and released, for each of the transformations. The build software is included in VERTCON 3.0 release 20190601 so that transformations connecting to NAPGD2022 epoch 2020.00 (and future reference epochs) can be quickly generated in a way consistent with VERTCON 3.0 release 20190601, sometime in the future. The final VERTCON 3.0 release 20190601 grids were integrated into the NGS Coordinate Conversion and Transformation Tool (NCAT) available at https://www.ngs.noaa.gov/NCAT/.