docsendpointsaccuracy-by-city

Accuracy By City

GET/api/v1/accuracy/by-city

Accuracy stats aggregated by city. Filter by date range, station, or city name. Supports minimum sample size filtering and sorting by mae, count, mean_error, city, or rmse. CSV export available.

Parameters

Name	Type	Required	Description
`days`	integer	optional	Rolling window Default: 90
`date_from`	YYYY-MM-DD	optional	Window start
`date_to`	YYYY-MM-DD	optional	Window end
`station_id`	string	optional	Filter to one station
`city`	string	optional	Filter by city name
`min_samples`	integer	optional	Exclude cities with fewer samples Default: 0
`sort_by`	string	optional	mae, count, mean_error, city, or rmse
`format`	string	optional	json or csv Default: json
`metric`	string	optional	high (default) or low — daily high vs daily low verification Default: high

Response Fields

Field	Type	Description
`station_id`	string	ICAO station identifier
`city_name`	string	City display name
`sample_size`	integer	Total verification pairs
`stats`	object	{ verification_pairs, unique_days, mean_error, std_dev, mae, rmse }

← Accuracy By Date

Accuracy By Station →

cURL

curl -s -H "Authorization: Bearer $API_KEY" "https://api.deltadaemon.com/api/v1/accuracy/by-city?days=30&min_samples=20&sort_by=mae"

JSON

{
  "success": true,
  "data": [
    {
      "station_id": "KSFO",
      "city_name": "San Francisco",
      "stats": {
        "verification_pairs": 32,
        "unique_days": 4,
        "mean_error": -1.34,
        "std_dev": 1.49,
        "mae": 1.47,
        "rmse": 1.99,
        "abs_error_p50": 1,
        "abs_error_p90": 3,
        "abs_error_p95": 4
      },
      "sample_size": 32
    }
  ],
  "metadata": {
    "generated_at": "2026-02-22T07:54:59.92025321Z",
    "days_analyzed": 30,
    "period_start": "2026-01-23",
    "period_end": "2026-02-22",
    "total_records": 872,
    "query_time_ms": 4
  }
}

cURL

curl -s -H "Authorization: Bearer $API_KEY" "https://api.deltadaemon.com/api/v1/accuracy/by-city?days=30&min_samples=20&sort_by=mae"

JSON

{
  "success": true,
  "data": [
    {
      "station_id": "KSFO",
      "city_name": "San Francisco",
      "stats": {
        "verification_pairs": 32,
        "unique_days": 4,
        "mean_error": -1.34,
        "std_dev": 1.49,
        "mae": 1.47,
        "rmse": 1.99,
        "abs_error_p50": 1,
        "abs_error_p90": 3,
        "abs_error_p95": 4
      },
      "sample_size": 32
    }
  ],
  "metadata": {
    "generated_at": "2026-02-22T07:54:59.92025321Z",
    "days_analyzed": 30,
    "period_start": "2026-01-23",
    "period_end": "2026-02-22",
    "total_records": 872,
    "query_time_ms": 4
  }
}