我需要一个 POI 数据库用于我正在从事的一个启动项目 - 它将是一个免费的基本版本和一个高级付费版本，因为用户将每月支付订阅费。
我想使用 foursquare 类型签入地点和 plancast 类型功能来搜索地点（单行搜索）。即，我需要：
- 在某个位置周围执行 POI 搜索
- 将用户与该 POI 关联起来，并带有时间戳
- 允许用户添加自己的 POI
- 提供 POI 的自由文本搜索（类似于 google 的单行搜索）
Google API 允许进行出色的搜索，但我知道可以完成的请求数量有限制？这会阻止扩展，并且可能会导致应用程序在用户过多时中断。另外，谷歌条款和条件对于在付费服务中使用此功能有何规定？
据我所知，Openstreetmap 没有这些限制，但他们是否也提供了良好的单行搜索类型 API？或者我该如何解决这个问题？
I need a POI database for a startup project I am working on - it will be a free basic version and a premium paid for version in the sense that user will pay a monthly subscription.
I would like to use foursquare type checkin to places and plancast type functionality to search for places (one-line search). Ie I need to:
- perform a search for POIs around a location
- associate users to that POI, with a time stamp
- allow users to add own POIs
- provide free-text search for POIs (a la google one-line search)
Google API allows great search, but I understand there are limits in number of requests that can be done? This would prevent scaling, and may result in application breaking when too many users. Also what does google T&C say about using this in a paid for service?
Openstreetmap I understand does not have these contstraints, but do they also provide a good one-line search type API? Or how could I solve this?
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查看 http://eventful.com/ 或 http://qype.com - 它们都有 API，您可以调用它来了解您附近发生的事情。您可以在应用程序中将这些事件转换为 POI。这些 API 可以免费使用（您的应用程序只需注明 Eventful 或 Qype）。
have a look at http://eventful.com/ or http://qype.com - they both have APIs you can call to get find out whats happening near you. You can convert these events into POIs in your application. The APIs are free to use (your app just need to credit Eventful or Qype).
查看 http://compass.webservius.com 上的 API - 可能没有您需要的一切，但是拥有美国超过 1600 万个商业地点的丰富数据。
Take a look at the API at http://compass.webservius.com - may not have everything you need, but has very rich data on 16+ million business locations in the USA.