Geoid Model
When performing coordinate transformation in the projection library, vertical coordinate system transformation and grid projection need to provide vertical datum grid data for effective transformation. EGM2008 geoid model elevation conversion is provided by default in the software. If you need to support other regional geoid models, you need to download the corresponding grid data files. The grid files are provided by the official PROJ library, which can be downloaded here proj-data-1.8, or on the official website https ://proj.org/download.html to download the latest version of proj-data. After downloading, unzip the file to the geoid folder in the software installation directory, the default is C:\Program Files\GreenValley Suite\LiDAR360MLS\7.2.0.0\geoid, "7.2.0.0" is the version number, and there will be differences between different versions.
Supported Geoid Model
| Geoid Model | Vertical coordinate system |
|---|---|
| GEOID99 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| GEOID03 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| GEOID06 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| GEOID09 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| GEOID12A | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| NMVD03 height - EPSG:6640 | |
| PRVD02 height - EPSG:6641 | |
| VIVD09 height - EPSG:6642 | |
| ASVD02 height - EPSG:6643 | |
| GUVD04 height - EPSG:6644 | GEOID12B | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| NMVD03 height - EPSG:6640 | |
| PRVD02 height - EPSG:6641 | |
| VIVD09 height - EPSG:6642 | |
| ASVD02 height - EPSG:6643 | |
| GUVD04 height - EPSG:6644 | GEOID18 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| PRVD02 height - EPSG:6641 | |
| VIVD09 height - EPSG:6642 | |
| GGM10 | NAVD88 height - EPSG:5703 |
| NAVD88 height (ft) - EPSG:8228 | |
| NAVD88 height (ftUS) - EPSG:6360 | |
| OSGM15 | Belfast height - EPSG:5732 |
| Douglas height - EPSG:5750 | |
| Lerwick height - EPSG:5742 | |
| Malin Head height - EPSG:5731 | |
| ODN (Offshore) height - EPSG:7707 | |
| ODN height - EPSG:5701 | |
| ODN Orkney height - EPSG:5740 | |
| St. Marys height - EPSG:5749 | |
| Stornoway height - EPSG:5746 | |
| EGM96 | EGM96 height - EPSG:5773 |
| EGM2008 | EGM2008 height - EPSG:3855 |
| MSL height - EPSG:5714 | |
| GSIGEO2001 | JGD2011 (vertical) height - EPSG:6695 |