{
  "title": "CWPP landscape measurements",
  "cells": 1088,
  "grid_shape": [
    34,
    32
  ],
  "crs": "EPSG:32613",
  "transform": [
    30.0,
    0.0,
    476400.30126619607,
    0.0,
    -30.0,
    4394170.970626461,
    0.0,
    0.0,
    1.0
  ],
  "source_rectangle": [
    476400.30126619607,
    4393169.1706264615,
    477358.0012661961,
    4394170.970626461
  ],
  "grid_bounds": [
    476400.30126619607,
    4393150.970626461,
    477360.30126619607,
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  ],
  "dates": {
    "lidar": 2020,
    "terrain": "2020-05-26 to 2021-03-13",
    "fuels": "2024 product year",
    "woody": "2026-09-15 according to archived EXIF, UTC camera clock; independent clock accuracy unverified"
  },
  "limitations": [
    "2020 heights and return fractions may include roofs; not tree-only canopy metrics.",
    "2026 woody cover combines trees and shrubs; not tree crown union area.",
    "Different dates and estimands: no temporal change inference.",
    "Native LF2024 EPSG5070 pixels are not aligned with 30m display EPSG32613 cells; mixed IDs retained as shares.",
    "No claim of 2021 CWPP parity or current fuel mass.",
    "Photo placement not survey-qualified."
  ],
  "unavailable": [
    "tree-only canopy height",
    "canopy base height",
    "canopy bulk density",
    "measured fuel mass"
  ],
  "sources": {
    "photography": "Aerial photography, 2026-09-15; camera timestamp unverified",
    "terrain": "USGS 3DEP 10m DEM; source acquisition range 2020-05-26 to 2021-03-13",
    "lidar": "2020 first returns normalized to classified ground; may include roofs",
    "fuel": "LANDFIRE 2024 FBFM40, native 30m EPSG:5070 grid"
  }
}