{
  "date": "2026-09-30",
  "method": "Priority-flood + D8 paths; independent MFD slope^1.1 contributing area; parent routing on exact flats. No rainfall or sewer capacity.",
  "grid_m": 20,
  "display_terrain_grid_m": 30,
  "crs": "EPSG:32633",
  "nx": 665,
  "ny": 588,
  "bounds": [
    513160.0,
    4879640.0,
    526450.0,
    4891390.0
  ],
  "context_bounds_utm": [
    505150.0,
    4872940.0,
    534490.0,
    4899400.0
  ],
  "origin_utm_m": [
    519805.0,
    4885515.0
  ],
  "minimum_contributing_area_km2": 0.05,
  "segments": 12338,
  "flagged_segments": 3096,
  "flag_bits": {
    "1": "Contributing area truncated by context edge",
    "2": "Depression filled by >0.1m",
    "4": "Copernicus surface-model fallback",
    "8": "Original local downhill slope <0.5 percent or flat routing"
  },
  "D8_mass_balance_error_cells": 0.0,
  "MFD_mass_balance_error_cells": 4.656612873077393e-10,
  "routing_cycle_check": "passed",
  "source_native_grid_m": "DGU 19.9858\u201319.9905m, EPSG3045 reprojected toEPSG32633",
  "dgu_land_coverage_fraction": 0.914162439358214,
  "water_source": "ESA WorldCover 2021 class80, 10m; no bathymetry",
  "limits": [
    "Topographic screening only, not validated flood prediction.",
    "Filled depressions assume overflow; real karst depressions may infiltrate instead.",
    "MFD and D8 disagreement is model sensitivity, not a statistical confidence interval.",
    "No drains, culvert surveys, rain, infiltration measurements or sea-level forcing.",
    "20m analysis cannot resolve street kerbs or culverts. Rendering terrain stays unchanged30m."
  ],
  "edge_influenced_segments": 191,
  "flat_or_depression_segments": 3004,
  "analysis_context_grid": [
    1467,
    1323
  ],
  "analysis_display_spacing_m": [
    19.984962406015036,
    19.982993197278912
  ],
  "elevation_source": "DGU DTM ~20m, Copernicus DSM only in gaps",
  "water_handling": "Permanent-water cells are outlets; only boundary-connected sea is set to0m. Inland water retains DTM/DSM elevation.",
  "flag_scope": "Flags2/4/8 describe local cells; flag1 propagates D8 context-edge influence. Unflagged cells are not validated."
}