codec / predictor / lossless

delta_w

Store how values change across each row.

delta_w compares every sample with the one on its left. Each row begins with one complete value, so rows never depend on one another. Choose it for rasters that change smoothly from west to east: the remaining differences are small and easier to compress.

ctid

0x72D701

header

uint32 · row width in samples

widths

8 · 16 · 32 · 64-bit integers

decode

rᵢ + previous reconstructed, per row (prefix sum)