Downloads - GEOID Models
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| Name | Size | Description | |
| EMG2008.GGF | 131M | Latest worldwide geoid model (2.5') |  |
| G03AK.GGF | 20M | Latest geoid model for the state of Alaska | |
| G03 LA.GGF | 4.7M | revised geoid model for the south Louisiana/Mississippi (post Katrina/Rita) - NGS Grid 7 | |
| G03US.ggf | 33M | latest geoid model for the continental US (INCLUDES the revised model for south Louisiana/Mississippi) | |
| Geoid TGO installation.txt | 409 | instructions for loading a new geoid model in Trimble Geomatics Office | |