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Platform coordinate rounding
PlatformSome platform APIs round submitted lat/lng to a fixed decimal precision (e.g. 4 decimals ≈ 11 m) before executing a circle target, shifting the effective center from the intended one.
Detection
Compare submitted coordinate precision/value against the platform's documented rounding behavior or the value echoed back by the API.
Mitigation
- Pre-round to the platform's known precision so reported and executed centers match
- Add a radius margin sized to the maximum rounding-induced center shift
Affected conversions
- Point+radiusH3
- H3circumscribed circle