如何在geonames和geocoder api中動態生成邊界框

Question

你好我想在用戶輸入城市地圖時獲取地震信息。現在我通過硬編碼（geonames earthquake api要求）來製作包圍盒。我想使邊界框與輸入的城市相同。我看到了地理編碼API V3做到這一點：

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

problem-這不會讓我得到東北西南它GEONAMES需求。有誰知道如何？

我當前的代碼

var address = document.getElementById("address").value; 
      geocoder.geocode({ 'address': address}, function(results, status) { 
       if (status == google.maps.GeocoderStatus.OK) { 
        // Calculate bounding box based on the given address 
        var north = results[0].geometry.location.lat() + .5; 
        var south = results[0].geometry.location.lat() - .5; 
        var east = results[0].geometry.location.lng() + .5; 
        var west = results[0].geometry.location.lng() - .5; 

        var earthquake = 'http://api.geonames.org/earthquakesJSON?north=' + north + '&south=' + south + '&east=' + east + '&west=' + west + '&username=*****'; 

+5 -5是在什麼樣的座標擴展了數字到南向北創建....等

Answer 1

您要使用的結果[0 ] .geometry.viewport其爲google.maps.LatLngBounds object

var north = results[0].geometry.viewport.getNorthEast().lat(); 
var south = results[0].geometry.viewport.getSouthWest().lat(); 
var east = results[0].geometry.viewport.getNorthEast().lng(); 
var west = results[0].geometry.viewport.getSouthWest().lng(); 

fixed fiddle

fiddle with return message from geonames

fiddle with hard-coded data that shows markers