Inverse of toNativeLength: convert a value stored in the anchor's
native length unit back to metres. Used by read-side translators (e.g.
apps/viewer's drawing-markup reader) to invert a derived value a writer
scaled with toNativeLength before storing it in a quantity set — the
mathematical inverse of that function's rounding rule, kept next to it so
a future change to the rounding constant cannot update one side without
the other.
Inverse of toNativeLength: convert a value stored in the anchor's native length unit back to metres. Used by read-side translators (e.g.
apps/viewer's drawing-markup reader) to invert a derived value a writer scaled withtoNativeLengthbefore storing it in a quantity set — the mathematical inverse of that function's rounding rule, kept next to it so a future change to the rounding constant cannot update one side without the other.