{"semantics":"Coarse canopy/stand proxies, NOT individual trees or official stem positions; species unknown. Only native16m WSL overview heights, not crown maxima from 1m data.","sourceNominalYear":2025,"mosaicYears":[2018,2025],"pixelAcquisitionDate":"Not established per pixel","nativeSourceM":1,"actuallyReadOverviewM":16,"proxySelectionGridM":64,"selection":"At least4 qualifying source cells per16-cell 64m block; choose highest qualifying native16m pixel. Height5..40m, >=4/9 neighbours3..40m, terrain slope<=50deg. Candidate must be outside old bbox and within exact new bbox.","overviewAggregation":"Provider-generated overview; aggregation algorithm not established. Height has mixed-cell and stereo/normalisation uncertainty, NOT fine crown maximum. Encoding MaxZError is not real measurement accuracy.","positionUncertainty":"At least +/-16m raster footprint plus stereo/geolocation errors; 64m selection suppresses stand detail. No trunk position.","crownRadius":"Estimated clamp(0.2*overviewHeight,3,8)m; not measured.","terrain":"Prepared panorama80m used only for conservative slope>50deg/nodata rejection and context; not vegetation source.","maskCoverage":"No complete outer water/building/road mask. Provider masks artificial objects but residual/agricultural/cliff artifacts possible. Two open-water centre windows checked, not proof of all shorelines.","missing":"Explicit native16m validity mask and region mask. NoData remains unknown, zero records never proves treelessness. Full opened window includes unexported old core and small grid alignment margins.","core":"Old640km2 database untouched; do not relabel its8m overview or combine both as uniform-resolution source."}