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Two pages on whether the ecmwf-opendata package and the ECMWF real-time open dataset can feed LUPMIS2's Analyse tools. They cannot, and the reason is resolution rather than anything fixable: the open subset is a 0.25 degree grid, and one cell at Ghana's latitude covers 762 km². Sagnarigu Municipal is 440 km² and touches three of those cells, two of which hold 89 % of it — so zonal statistics over its 82 collector zones would hand all 82 one of three numbers. The figure is drawn from the real district boundary rather than sketched. Three further findings: it is a forecast rather than a climatology, so it cannot answer what a place is normally like; the archive is the last 12 runs, about two to three days, so no history can ever be fetched; and the analysis tools take vector layers only, so a raster cannot be fed in today at any resolution. What it can do is a district-level forecast overlay — rainfall and temperature for the coming days — which is about two days of work and reuses the path that already publishes koforidua_dem.tif to the object store as a cog layer. Page 2 outlines that pipeline with the effort broken down. ECMWF is moving the open subset to 0.1 degrees, expected by the end of October 2026, which would cover the same district with 10 cells instead of 3. That does not change either recommendation, but it does make now a good time to build the pipeline. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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