A Single Topographic Zero
MSI-TOPO-1.0 defines a global elevation reference derived from the dynamic mean sea surface and Earth’s gravity field, fixed at a single epoch and valid everywhere.
One vertical reference for the planet. MSI-TOPO defines a single, stable elevation zero for land, sea, and infrastructure — worldwide. The same zero everywhere — from mountain summit to ocean trench to orbital platform.
Today, elevation depends on where you stand politically. Nations use different sea levels, gravity models, and local datums. The result is conflicting maps, broken flood models, and incompatible infrastructure data.
MSI-TOPO-1.0 defines a global elevation reference derived from the dynamic mean sea surface and Earth’s gravity field, fixed at a single epoch and valid everywhere.
This tool will allow users to compare local elevations against MSI Topographic Zero, revealing hidden offsets between national height systems.
MSI-TOPO integrates seamlessly with MSI-TRF and MSI-DRIFT, creating a time-aware, globally consistent vertical framework.
