Google Maps API - geocoding accuracy chart?

Question

Where in the Google Maps API docs can I find a table explaining the accuracy values of Geocode lookups?

Has the range of values changed in between V2 and V3

Answer 1

@Pekka

I don't know if you saw, but V3 does not include accuracy anymore. It seems that there is a different way though. If you add the results of the address_component elements you get a similar result. Disclaimer: I am not 100% sure about this but it looks like that they included the accuracy this way. I am currently doing some testing is this the way to go.

Here an example:

I searched for: 555 Pearl Street, Boulder

Here the result with Address Level accuracy (8 levels deep).

        [address_component] => Array
            (
                [0] => SimpleXMLElement Object
                    (
                        [long_name] => 555
                        [short_name] => 555
                        [type] => street_number
                    )

                [1] => SimpleXMLElement Object
                    (
                        [long_name] => Pearl St
                        [short_name] => Pearl St
                        [type] => route
                    )

                [2] => SimpleXMLElement Object
                    (
                        [long_name] => Boulder
                        [short_name] => Boulder
                        [type] => Array
                            (
                                [0] => locality
                                [1] => political
                            )

                    )

                [3] => SimpleXMLElement Object
                    (
                        [long_name] => Boulder
                        [short_name] => Boulder
                        [type] => Array
                            (
                                [0] => administrative_area_level_3
                                [1] => political
                            )

                    )

                [4] => SimpleXMLElement Object
                    (
                        [long_name] => Boulder
                        [short_name] => Boulder
                        [type] => Array
                            (
                                [0] => administrative_area_level_2
                                [1] => political
                            )

                    )

                [5] => SimpleXMLElement Object
                    (
                        [long_name] => Colorado
                        [short_name] => CO
                        [type] => Array
                            (
                                [0] => administrative_area_level_1
                                [1] => political
                            )

                    )

                [6] => SimpleXMLElement Object
                    (
                        [long_name] => United States
                        [short_name] => US
                        [type] => Array
                            (
                                [0] => country
                                [1] => political
                            )

                    )

                [7] => SimpleXMLElement Object
                    (
                        [long_name] => 80302
                        [short_name] => 80302
                        [type] => postal_code
                    )

            )

Answer 2

Here are the Google Maps API Docs. It contains a table with accuracy values...

http://code.google.com/apis/maps/documentation/reference.html#GGeoAddressAccuracy

Constant | Description
0 Unknown location.
1 Country level accuracy.
2 Region (state, province, prefecture, etc.) level accuracy.
3 Sub-region (county, municipality, etc.) level accuracy.
4 Town (city, village) level accuracy.
5 Post code (zip code) level accuracy.
6 Street level accuracy.
7 Intersection level accuracy.
8 Address level accuracy.
9 Premise (building name, property name, shopping center, etc.) level accuracy.

Answer 3

Here are the real status answers from geocoder:

You can output the status inside your geocoding function:

myMap.geocoder.geocode( 
    { address: someAdress } ), 
    function ( responses, status ) { 
        console.log( status );
    }
);

When passing the status, you can switch those four values:

    switch ( status )
    {
        case 'ROOFTOP' :
            var precision = 'precise';
            break;
        case 'RANGE_INTERPOLATED' :
            var precision = 'interpolated';
            break;
        case 'APPROXIMATE' :
            var precision = 'approximately';
            break;
        case 'ZERO_RESULTS' :
            var precision = 'no address';
            break;
    }