{
  "method": "Priority flood diagnostic surface; D8 steepest descent, MFD slope^1.1. Flats follow flood parent. Original terrain is preserved for display.",
  "grid_m": 20,
  "valid_cells": 1989328,
  "water_outlet_cells": 17213,
  "D8_mass_balance_error_cells": 0.0,
  "MFD_mass_balance_error_cells": 0.0,
  "routing_order_check": "passed",
  "segments": 1652,
  "minimum_contributing_area_km2": 0.2,
  "limited_by_source_coverage": true,
  "limitations": [
    "Regional topographic screening only. Not a flood-hazard or risk map.",
    "No rainfall, infiltration, stormwater drains, culvert surveys or river boundary conditions.",
    "20m mesh cannot resolve curbs, walls or individual street drainage.",
    "Water polygons are treated as outlets. Sava river flooding and backwater are not simulated.",
    "DTM coverage limits contributing areas. All catchment sizes are conditional on coverage; edge flags do not prove a complete basin.",
    "Fill depth is a numerical diagnostic, never flood depth.",
    "No independent event or survey validation."
  ]
}