A frozen copy of a GeoFrame's placement — its ECEF origin plus the ENU
tangent basis — enough to map that frame's world coordinates back to ECEF. Stamped
on baked geometry so a later, REORIENTED frame can place it with the correct rigid
transform (continuous reorientation / RTC) instead of needing the geometry re-baked.
A frozen copy of a GeoFrame's placement — its ECEF origin plus the ENU tangent basis — enough to map that frame's world coordinates back to ECEF. Stamped on baked geometry so a later, REORIENTED frame can place it with the correct rigid transform (continuous reorientation / RTC) instead of needing the geometry re-baked.