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How do I translate the Google maps v3 Geocode location_type to a Geocode score 0-9?

Posted on 2013-01-06
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Last Modified: 2013-01-06
Hi,

I am going through the process of converting from Google v2 Maps API to v3 Maps API. A problem that I have encountered is that a Geocode score (0-9) is not used by the V3 API.

Instead the API uses (geometry.location_type) which will return either ROOFTOP, GEOMETRIC_CENTER, RANGE_INTERPOLATED or APPROXIMATE. I can also use (google.maps.GeocoderStatus.OK) to see if an address can actually be Geocoded.

Our back office systems and IOS App are programmed to work off a (0-9) score I could go through and update them all but that would be rather time consuming. I am wondering if anyone has any idea as to how the string returned by (geometry.location_type) can be converted to a (0-9) score maybe by a case statement or something like that?

If anyone has any better ideas or I am over complicating this please let me know.

I guess what I am looking for is how to interpret the string returned by (geometry.location_type) as a number that resembles the v2 API Geocode score from 1 to 9 as closely as possible. The programming is not hard the interpretation of the string to a Geocode number score is the tricky part.

Thanks to anyone who can help.
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Question by:jwleys
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4 Comments
 

Author Comment

by:jwleys
ID: 38749280
Reference V3 API method:
https://developers.google.com/maps/documentation/javascript/geocoding

location_type stores additional data about the specified location. The following values are currently supported:

- google.maps.GeocoderLocationType.ROOFTOP indicates that the returned result reflects a precise geocode.

- google.maps.GeocoderLocationType.RANGE_INTERPOLATED indicates that the returned result reflects an approximation (usually on a road) interpolated between two precise points (such as intersections). Interpolated results are generally returned when rooftop geocodes are unavailable for a street address.

- google.maps.GeocoderLocationType.GEOMETRIC_CENTER indicates that the returned result is the geometric center of a result such as a polyline (for example, a street) or polygon (region).

- google.maps.GeocoderLocationType.APPROXIMATE indicates that the returned result is approximate.
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Author Comment

by:jwleys
ID: 38749287
Reference V2 API method:
https://developers.google.com/maps/documentation/geocoding/v2/

0 = Unknown accuracy.
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.
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Accepted Solution

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jwleys earned 0 total points
ID: 38749419
//Possible solution JavaScript Case Statement bit of a hack would like to a second opinion:
if (status == google.maps.GeocoderStatus.OK) {
   switch(results[0].geometry.location_type){
      case "ROOFTOP":
         geo_score = 9;
      break;

      case "RANGE_INTERPOLATED":
         geo_score = 7;
      break;

      case "GEOMETRIC_CENTER":
         geo_score = 6;
      break;
   
      case "APPROXIMATE":
         geo_score = 4;
      break;
   }
}else{
   geo_score = 0;
}
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Author Closing Comment

by:jwleys
ID: 38749530
It's a hack but it works and seems to do the job just fine.
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