pub const TAG_SPAT: u8 = 0x0F;Expand description
Spatial cell postings (2i): 0x0F | field | level u8 | hilbert u64 | id -> [bbox f32x4 outward-rounded]. Hilbert order makes a neighbourhood’s postings contiguous on disk; the bbox filters without payload reads; a degenerate bbox IS the point (exact tier free for point data).