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Truly Equal Area
Every cell has the same area at each resolution — guaranteed by the ISEA (Icosahedral Snyder Equal Area) projection. No ±50% distortions like in gnomonic-based systems.
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Z7 Hierarchical Indexing
A single 64-bit integer encodes resolution, base cell, and full hierarchical path. Parent–child relationships are simple bit operations. Compatible with H3-style workflows.
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21 Resolution Levels
From continental scale (~8,200 km cell diameter) at resolution 0, down to centimetre precision (~2.9 cm) at resolution 20. Five more levels than H3.
Key Numbers
21
Resolution levels (0–20)
12
Base cells (pentagons)
7
Children per parent cell
64-bit
Z7 integer index size