Airbnb 在哪里存储它的位置？

Question

我想知道Airbnb是如何存储出租房的地理位置信息的。

他们将其存储在 Google 服务或它自己的服务器中？

Answer 1

你可以看看Google Cloud Platform. In concrete you can be interested in Cloud Datastore。

您可以将 GeoPt 添加到 Entity 并执行地理空间查询。来自 the documentation:

To add a GeoPt property to an entity, use the GeoPt class, specifying latitude and longitude:

Entity station = new Entity("GasStation");
station.setProperty("brand", "Ocean Ave Shell");
station.setProperty("location", new GeoPt(37.7913156f, -122.3926051f));
datastore.put(station);

Use the datastore query filter StContainsFilter to test if a GeoPt is contained in a given GeoRegion, for example:

// Testing for containment within a circle
GeoPt center = new GeoPt(latitude, longitude);
double radius = r; // Value is in meters.
Filter f1 = new StContainsFilter("location", new Circle(center, radius));
Query q1 = new Query("GasStation").setFilter(f1);

// Testing for containment within a rectangle
GeoPt southwest = new GeoPt(swLat, swLon);
GeoPt northeast = new GeoPt(neLat, neLon);
Filter f2 = new StContainsFilter("location", new Rectangle(southwest, northeast));
Query q2 = new Query("GasStation").setFilter(f2);