I have a set of map tiles that follow the typical quad tree format however, at level 0 (zoomed all the way out), I have two tiles instead of the expected 1. The tiles also follow a {z}/{y}/{x} numbering system. What is this system called? I don't see this format listed on Wikipedia - Tile Web Map. I need a name to help find internet search results.

This is what I have for level 0.

  • 0/0/0.png
  • 0/0/1.png

1 Answer 1


It is the "World CRS84 Quad TileMatrixSet" from the OGC standard https://docs.opengeospatial.org/is/17-083r2/17-083r2.html#63

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