Port of the subset of Microwaveprop.Weather.NexradClient used by f00's chain step: 5-min-rounded IEM n0q PNG fetch, palette-indexed decode via the png crate, and per-POI max_reflectivity_dbz extraction from a 25-pixel half-box (matches Elixir's DEFAULT_BOX_HALF). The palette↔dBZ math and (lat, lon)↔pixel projection are bit-for-bit copies of the Elixir formulas. 6 pure-math unit tests cover pixel mapping, box clipping, and timestamp rounding. Network-live golden fixture deferred until the full Stream A wiring lands. |
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| Dockerfile | ||