# h3-spatial-indexing

Published articles for h3-spatial-indexing.

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## My Sea Router Turned a 50-Mile Canal Crossing Into a 10,337-Mile Detour

DevFeed: [My Sea Router Turned a 50-Mile Canal Crossing Into a 10,337-Mile Detour](<https://devfeed.tech/articles/my-sea-router-turned-a-50-mile-canal-crossing-into-a-10-337-mile-detour-59670.md>)

Original publisher: [Read original article](<https://hackernoon.com/my-sea-router-turned-a-50-mile-canal-crossing-into-a-10337-mile-detour?source=rss>)

Author: Ivan Kuznetsov

Published: 2026-09-24T18:48:56Z

Content type: article

Language: en

Sources: [HackerNoon](<https://devfeed.tech/sources/hackernoon.md>)

Topics: [data](<https://devfeed.tech/topics/data.md>), [Graphs](<https://devfeed.tech/topics/graphs.md>), [Routing (disambiguation)](<https://devfeed.tech/topics/routing.md>), [quantization](<https://devfeed.tech/topics/quantization.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [data](<https://devfeed.tech/tags/data.md>), [gis](<https://devfeed.tech/tags/gis.md>), [graph](<https://devfeed.tech/tags/graph.md>), [graph-edge-quantization](<https://devfeed.tech/tags/graph-edge-quantization.md>), [h3-geospatial-indexing](<https://devfeed.tech/tags/h3-geospatial-indexing.md>), [h3-spatial-indexing](<https://devfeed.tech/tags/h3-spatial-indexing.md>), [hackernoon-top-story](<https://devfeed.tech/tags/hackernoon-top-story.md>), [maritime-route-planning](<https://devfeed.tech/tags/maritime-route-planning.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [openstreetmap](<https://devfeed.tech/tags/openstreetmap.md>), [openstreetmap-coastline-data](<https://devfeed.tech/tags/openstreetmap-coastline-data.md>), [routing](<https://devfeed.tech/tags/routing.md>)

### AI overview

A marine navigation app's global sea-routing graph produced a 10,337-nautical-mile route for a roughly 50-nautical-mile Panama Canal crossing. The investigation traces the error to coastline data that treated the canal as land and explains how land polygons, an H3 grid, graph construction, and A* routing shaped the result.

### Source excerpt

A 10,337-nautical-mile detour exposed how coastline data, H3 resolution, and distance quantization can break a global sea-routing graph.