基于 SOAP 或 REST 的地理定位服务？
有人知道可以接受 SOAP 或 REST 请求的（最好是免费的）Web 服务吗？
该请求将包含一个 IP 地址，并且该服务将返回该 IP 位置的近似值。
编辑：我需要解决可能的城市问题。
Is anyone aware of a (preferablly free) webservice that would accept a SOAP or REST request.
This request would contain an IP address, and the service would return an approximation of that IP's location.
EDIT: I need resolution down to the city of possible.
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http://countries.nerd.dk 通过 IP 提供国家/地区信息。 您需要多少分辨率？
There is http://countries.nerd.dk which provides country information by IP. How much resolution do you need?
它不是网络服务，但 MaxMind 还提供免费数据库供您下载。 如果您需要 Web 服务，那么使用此数据库在您自己的服务器上设置一个 Web 服务将非常简单。 如果免费数据库不合适，您还可以获得更准确的数据库的站点许可证。
It's not a web service, but MaxMind also provide a free database that you can download. If you need a web service, then it would be trivial to set one up on your own server using this database. You can also get a site-license for a more accurate database if the free one isn't suitable.
MaxMind 做了一个相当便宜的。 您将 IP 作为查询字符串参数发送，然后它会向您发送回 2 个字母的代码或错误代码。 在转向我们自己的查找表之前，我们使用了它很长一段时间，它快速且可靠。
找到链接：http://www.maxmind.com/app/web_services#country - 200,000 次查找的费用为 20 美元，这根本不值钱。
编辑：MaxMind 还提供一项服务，分辨率可精确到城市：http://www.maxmind。 com/app/web_services#city。 50,000 次查询的费用为 20 美元，价格稍贵一些，但这仍然不算太糟糕。 我无法保证这项服务的准确性，因为我只使用了国家/地区分辨率，而这就是我们所需要的。
MaxMind do a fairly cheap one. You send the IP as a query string parameter, then it sends you back either a 2 letter code or an error code. We used it for quite a while before moving to our own lookup tables, and it's quick and reliable.
Found the link: http://www.maxmind.com/app/web_services#country - it's $20 for 200,000 lookups which isn't bad value at all.
EDIT: MaxMind also do a service with resolution down to the city: http://www.maxmind.com/app/web_services#city. It's a bit more expensive at $20 for 50,000 queries but that still isn't too bad. I can't vouch for the accuracy of this service though as I have only used the country resolution one, as that's all we need.