get city from geocoder results?

Question

Having problems getting the different arrays content from geocoder results.

item.formatted_address works but not item.address_components.locality?

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Answer 1

// Use Google Geocoder to get Lat/Lon for Address
function codeAddress() {
    // Function geocodes address1 in the Edit Panel and fills in lat and lon
    address = document.getElementById("tbAddress").value;
    geocoder.geocode({ 'address': address }, function (results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
            loc[0] = results[0].geometry.location.lat();
            loc[1] = results[0].geometry.location.lng();
            document.getElementById("tbLat").value = loc[0];
            document.getElementById("tbLon").value = loc[1];
            var arrAddress = results[0].address_components;
            for (ac = 0; ac < arrAddress.length; ac++) {
                if (arrAddress[ac].types[0] == "street_number") { document.getElementById("tbUnit").value = arrAddress[ac].long_name }
                if (arrAddress[ac].types[0] == "route") { document.getElementById("tbStreet").value = arrAddress[ac].short_name }
                if (arrAddress[ac].types[0] == "locality") { document.getElementById("tbCity").value = arrAddress[ac].long_name }
                if (arrAddress[ac].types[0] == "administrative_area_level_1") { document.getElementById("tbState").value = arrAddress[ac].short_name }
                if (arrAddress[ac].types[0] == "postal_code") { document.getElementById("tbZip").value = arrAddress[ac].long_name }
            }
            document.getElementById("tbAddress").value = results[0].formatted_address;
        }
        document.getElementById("pResult").innerHTML = 'GeoCode Status:' + status;
    })
}

Answer 2

I had to create a program that would fill in the latitude, longitude, city, county, and state fields in a user form when the user clicks on a location on the map. The page can be found at http://krcproject.groups.et.byu.net and is a user form to allow the public to contribute to a database. I don't claim to be an expert, but it works great.

<script type="text/javascript">
  function initialize() 
  {
    //set initial settings for the map here
    var mapOptions = 
    {
      //set center of map as center for the contiguous US
      center: new google.maps.LatLng(39.828, -98.5795),
      zoom: 4,
      mapTypeId: google.maps.MapTypeId.HYBRID
    };

    //load the map
    var map = new google.maps.Map(document.getElementById("map"), mapOptions);

    //This runs when the user clicks on the map
    google.maps.event.addListener(map, 'click', function(event)
    {
      //initialize geocoder
      var geocoder = new google.maps.Geocoder()

      //load coordinates into the user form
      main_form.latitude.value = event.latLng.lat();
      main_form.longitude.value = event.latLng.lng();

      //prepare latitude and longitude
      var latlng = new google.maps.LatLng(event.latLng.lat(), event.latLng.lng());

      //get address info such as city and state from lat and long
      geocoder.geocode({'latLng': latlng}, function(results, status) 
      {
        if (status == google.maps.GeocoderStatus.OK) 
        {
          //break down the three dimensional array into simpler arrays
          for (i = 0 ; i < results.length ; ++i)
          {
            var super_var1 = results[i].address_components;
            for (j = 0 ; j < super_var1.length ; ++j)
            {
              var super_var2 = super_var1[j].types;
              for (k = 0 ; k < super_var2.length ; ++k)
              {
                //find city
                if (super_var2[k] == "locality")
                {
                  //put the city name in the form
                  main_form.city.value = super_var1[j].long_name;
                }
                //find county
                if (super_var2[k] == "administrative_area_level_2")
                {
                  //put the county name in the form
                  main_form.county.value = super_var1[j].long_name;
                }
                //find State
                if (super_var2[k] == "administrative_area_level_1")
                {
                  //put the state abbreviation in the form
                  main_form.state.value = super_var1[j].short_name;
                }
              }
            }
          }
        }
      });
    });
  }
</script>

Answer 3

Returns locality if exist. If not - returns administrative_area_1

city = results[0].address_components.filter(function(addr){
   return (addr.types[0]=='locality')?1:(addr.types[0]=='administrative_area_level_1')?1:0;
});

Answer 4

I used a lodash function called find which returns the object that the predicate returns true for. As simple as that!

let city = find(result, (address) => {
  return typeof find(address.types, (a) => { return a === 'locality'; }) === 'string';
});

Answer 5

Well this worked for me if you want to get the city

var city = "";
function getPositionByLatLang(lat, lng) {
    geocoder = new google.maps.Geocoder();
    var latlng = new google.maps.LatLng(lat, lng);
    geocoder.geocode({ 'latLng': latlng }, function (results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
            if (results[1]) {
                //formatted address
                city = results[0].plus_code.compound_code;
                city = city.substr(0, city.indexOf(','));
                city = city.split(' ')[1];

                console.log("the name of city is: "+ city);
            }
        } else {
            // alert("Geocoder failed due to: " + status);
        }
    });
}

Answer 6

tried a couple of different requests:

MK107BX

Cleveland Park Crescent, UK

like you say, array size returned is inconsistent but the Town for both results appears to be in the address_component item with type of [ "locality", "political" ]. Perhaps you could use that as an indicator?

EDIT: get the locality object using jQuery, add this to your response function:

var arrAddress = item.results[0].address_components;
// iterate through address_component array
$.each(arrAddress, function (i, address_component) {
    if (address_component.types[0] == "locality") // locality type
        console.log(address_component.long_name); // here's your town name
        return false; // break the loop
    });