Search Confidence

Reference

Naurt provides you with two tools to understand the quality of a match from the geocoder.

1. Data Accuracy: the expected quality of geographic data for that address
2. Search Confidence: how likely the found address is to be a match

This page will discuss how search confidence works.

Confidence

Confidence is how likely Naurt thinks a found address is to be the correct address searched for.

Each Hit will have a search_confidence field which varies from 0.0 to 1.0. 0.0 indicates an match extremely unlikely to be true, 1.0 indicates near certainty.

Naurt does not filter based on the search confidence. It is possible to receive an address with a very low search confidence. You may wish to consider ignoring results with unacceptably low confidence, depending on your application.

Example Response with Confidence

{
  "request_id": "86cdf4e9-cd7b-4836-aeb0-fd8d7fa03110",
  "responses": [
    {
      "additional_matches": [],
      "best_match": {
        "address": "35 Clarendon Road, Cheshunt, Waltham Cross, EN8 9DL, United Kingdom",
        "geojson": {
          "features": [
            {
              "geometry": {
                "coordinates": [
                  -0.036495,
                  51.70522
                ],
                "type": "Point"
              },
              "properties": {
                "naurt_type": "basic_geocode"
              },
              "type": "Feature"
            },
            {
              "geometry": {
                "coordinates": [
                  [
                    -0.036493108,
                    51.705280131
                  ]
                ],
                "type": "MultiPoint"
              },
              "properties": {
                "accuracy": {
                  "quality": "high"
                },
                "naurt_type": "naurt_door"
              },
              "type": "Feature"
            },
            {
              "geometry": {
                "coordinates": [
                  [
                    [
                      -0.0360252905826841,
                      51.70527881528648
                    ],
                    [
                      -0.0365740128653158,
                      51.70528105243699
                    ],
                    [
                      -0.0365748245513342,
                      51.70520459526901
                    ],
                    [
                      -0.0361215508466639,
                      51.7052027472609
                    ],
                    [
                      -0.0361220272710638,
                      51.70515787016552
                    ],
                    [
                      -0.0360265923958014,
                      51.70515748107477
                    ],
                    [
                      -0.0360252905826841,
                      51.70527881528648
                    ]
                  ]
                ],
                "type": "Polygon"
              },
              "properties": {
                "contributors": [
                  "© OpenStreetMap contributors"
                ],
                "naurt_type": "naurt_building"
              },
              "type": "Feature"
            },
            {
              "geometry": {
                "coordinates": [
                  [
                    [
                      -0.03655976563906356,
                      51.70536808870813
                    ],
                    [
                      -0.03656024515762707,
                      51.70534553822668
                    ],
                    [
                      -0.03642443948673787,
                      51.70534442920879
                    ],
                    [
                      -0.03642395996817435,
                      51.70536697969081
                    ],
                    [
                      -0.03655976563906356,
                      51.70536808870813
                    ]
                  ]
                ],
                "type": "Polygon"
              },
              "properties": {
                "accuracy": {
                  "quality": "high"
                },
                "minimum_parking_to_door_distance": 10.80533307445577,
                "naurt_type": "naurt_parking"
              },
              "type": "Feature"
            }
          ],
          "type": "FeatureCollection"
        },
        "id": "ef92d292-6146-3462-8c03-87049929151e",
        "search_confidence": 1.0
      },
      "status": "ok"
    }
  ],
  "version": "v2.6.10"
}