搜索引擎按距离 [英] Search engine by distance

问题描述

我希望在我的网站上选择我的Serach引擎，以便用户可以搜索设置距离内的物品，例如在10英里或20英里等范围内搜索商品.我想知道如何做到这一点?

I am looking to make an option of my serach engine on my site so that users can search for items within a set distance, e.g. search items within 10 miles, or 20 miles etc. I was wondering how this could be done?

用户将必须输入他们的邮政编码，而我也要输入该项目的位置的邮政编码，一旦他们点击搜索，就需要离开以工作两个位置之间的距离(以英里为单位)，然后按顺序显示结果按距离因为最接近的项目是第一个结果.在使用地图的获取路线"选项来计算以英里为单位的距离时，是否有Google API?还是我可以添加到数据库中的内容?

The user would have to enter thier postcode, while i also have the postcode of the item's location and once they hit search there needs to be a away to work the distance between the two locations in miles and then display the results in order by distance; as in the closest item is the first result. Is there a google api for this as in use the maps 'get directions' option to work out the distance in miles? Or something i can add to my database?

推荐答案

Google地理编码API提供邮政编码查找，甚至可以提供国家/地区，城市，经纬度，甚至只需提供邮政编码即可作为地址.一旦获得纬度/经度，就可以轻松计算距离并对结果进行排序.

The Google Geocoding API provides zip code lookup and can provide the country, city, lat/lon given even just a zip code as the address. Once you have the lat/lon then you can easily calculate the distance and sort the results.

http://code.google.com/apis/maps/documentation /geocoding/#GeocodingRequests

注意:您只能将Geocoding API与Google地图结合使用；禁止对结果进行地理编码而不在地图上显示结果.有关允许使用的完整详细信息，请查阅链接.

Note: you can only use the Geocoding API in conjunction with a Google map; geocoding results without displaying them on a map is prohibited. For complete details on allowed usage, consult the link.

因此，例如，如果您请求查找邮政编码94043的邮政编码，则会调用以下URL:

So if for example if you request lookup for zip code 94043 you call following URL:

http://maps.googleapis.com/maps/api/geocode/json?address=94043&sensor=false

使用JSON的结果如下:

Which would result with JSON such as following:

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "94043",
               "short_name" : "94043",
               "types" : [ "postal_code" ]
            },
           ...
          "location" : {
               "lat" : 37.4284340,
               "lng" : -122.07238160
          },
          "location_type" : "APPROXIMATE",
         ...
   "status" : "OK"
 }

如果您由于某种原因无法使用Google API，则以下是非Google Geocoder API和服务的列表:

If you cannot use the Google API for some reason then here is list of non-Google Geocoder APIs and services:

• http://code.google.com/p/gmaps- api-issues/wiki/NonGoogleGeocoders
• http://webgis.usc.edu/Services/Geocode/About/GeocoderList.aspx

• http://code.google.com/p/gmaps-api-issues/wiki/NonGoogleGeocoders
• http://webgis.usc.edu/Services/Geocode/About/GeocoderList.aspx

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