Can I know if a location on Google Maps isn't found when using this lazy method?_问答_开发者

Can I know if a location on Google Maps isn't found when using this lazy method?

开发者 https://www.devze.com 2023-01-16 03:39 出处：网络

I\'m showing a Google Map based on a street address supplied from an outside source. My JavaScript is very simple, and I build the link like so

I'm showing a Google Map based on a street address supplied from an outside source.

My JavaScript is very simple, and I build the link like so

var googleMap = 'http://maps.google.com/maps?f=q&amp;source=s_q&amp;hl=en&amp;geocode=&amp;q=' + address + '&amp;ie=UTF8';

This is quick and easy, and works. But some of the incoming addresses aren't exactly addresses (they include some stuff which shouldn't be there).

When Google Maps can't make heads or tails of the address, it defaults to showing a map of USA. Unfortunately, I'm in Australia.

Is there any way using this lazy method to know if Google Maps couldn't match the address, or can I show Australia by default?

... or do I need 开发者_如何学运维to look at the API?

What about using maps.google.com.au? Note that the parameters might be a bit different.

http://maps.google.com.au/maps?q=Melbourne

http://maps.google.com.au/maps?q=Something-Garbage-That-Does-Not-Exist

You could also use the Maps API, as you suggested. Something like that would be very easy to do:

<!DOCTYPE html>
<html> 
<head> 
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
   <title>Google Maps Geocoding Default Location</title> 
   <script src="http://maps.google.com/maps/api/js?sensor=false" 
           type="text/javascript"></script> 
</head> 
<body> 
   <div id="map" style="width: 400px; height: 300px;"></div> 

   <script type="text/javascript"> 

   var address = 'Melbourne, Australia';

   var map = new google.maps.Map(document.getElementById('map'), { 
       mapTypeId: google.maps.MapTypeId.TERRAIN,
       center: new google.maps.LatLng(-25.50, 135.00),
       zoom: 3
   });

   var geocoder = new google.maps.Geocoder();

   geocoder.geocode({
      'address': address
   }, 
   function(results, status) {
      if(status == google.maps.GeocoderStatus.OK) {
         new google.maps.Marker({
            position: results[0].geometry.location,
            map: map
         });
         map.setCenter(results[0].geometry.location);
      }
   });

   </script> 
</body> 
</html>

Screenshot:

Can I know if a location on Google Maps isn't found when using this lazy method?