{"version":2,"years":[1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025],"cells":9636005,"coverage":"Contiguous United States and 29 preserved historical study windows","source":"Annual NLCD C1V2 FctImp","cell_size_m":900,"display_threshold_pct":10,"recent_interval":[2020,2025],"track_input_year":2016,"track_outcome_interval":[2021,2025],"confirmation_status":"FAIL","wins":18,"required_wins":20,"annual_values":{"url":"/data/chora-national/annual-values.f32","format":"little-endian float32; cell id \u00d7 41 values; NaN = missing support","sha256":"2e92124af0e969326b369de00b4bf5b9e443b86f21857c1425a4142a178d6e45"},"cell_grid":{"url":"/data/chora-national/cell-grid.i32","format":"little-endian int32 x,y pairs. Center = (index + 0.5) \u00d7 900 metres in WGS84-Albers. Row ordinal = gid.","sha256":"54e5552ec89f9a2164e8cec576b2187c056c67dd30f0b3229dc3edc97bda59a1"},"historical_track_export":{"url":"/data/chora-national/track-record.csv.gz","rows":199781,"sha256":"b8fcc83a402995523c3b94a07ded326566ce34e90752a2d87420405f1287fa22"},"freeze_sha256":"557423fee37c74d72997679aaaf9da77735ef7539c9cdc8eda2c94af82241804","result_sha256":"ea7df39918be3b965a9d34f41640279cff40a527eb0e4b4fc430e5c4a7ea9002","place_assignment":"Whole 900 m cells whose centers lie in Census 2025 boundaries. All CONUS counties are indexed. Tiny places with zero center-included cells are explicit.","build_scope":"Internal local descriptive Atlas. Historical track record remains restricted to the original 29 windows; no prospective rankings.","tiles":{"url":"/data/chora-national/cells.pmtiles","sha256":"b5d6fc0dd422abd9f8c14fa418719e64cc2a29e83b908c4d2bd188cde41ac47a","bytes":957040885,"minzoom":5,"maxzoom":10}}