8000 Unexpected zero J-coordinate in local ijk+ when resolution > 0 · Issue #1003 · uber/h3 · GitHub
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Unexpected zero J-coordinate in local ijk+ when resolution > 0 #1003

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valenadels opened this issue Apr 24, 2025 · 0 comments
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Unexpected zero J-coordinate in local ijk+ when resolution > 0 #1003

valenadels opened this issue Apr 24, 2025 · 0 comments

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@valenadels
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valenadels commented Apr 24, 2025 •
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Hi! I’m using H3 to assign local ijk+ coordinates to cells around a given origin.
At resolution 0, the six direct neighbors of the origin 0x8075FFFFFFFFFFF are:

(1, 0, 1)
(1, 0, 0)
(0, 1, 0)
(0, 1, 1)
(1, 1, 0)

However, when increasing resolution, for example to 2 (origin 0x82754FFFFFFFFFF), the output is:

(3, 0, 2)
(2, 0, 2)
(2, 0, 3)
(3, 0, 4)
(4, 0, 4)
(4, 0, 3)

I expected (acording to the image bellow) some of the neighbors to have a non-zero j component, but it’s always zero.

Image

(I'm using H3 version: v4.2.1)
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