NoSQL：如何检索基于lat&长？ [英] NoSQL: How to retrieve a 'house' based on lat & long?
问题描述
我有一个用于存储房地产房屋的NoSQL系统。
I have a NoSQL system for storing real estate houses.
我在每个房子的键值存储中有一个信息是经度和纬度。
One piece of information I have in my key-value store for each house is the longitude and latitude.
如果我要检索地理纬度/长框，像下面的SQL：
If I wanted to retrieve all houses within a geo-lat/long box, like the SQL below:
SELECT * from houses
WHERE latitude IS BETWEEN xxx AND yyy
AND longitude IS BETWEEN www AND zzz
问题：
-
我如何使用NoSQL ...只使用键值存储系统进行这种类型的检索？
How would I do this type of retrieval with NoSQL ... using just a key-value store system?
即使我能用NoSQL做到这一点，它会更有效率，或者只是回到使用传统数据库更快地检索这种类型的信息？
Even if I could do this with NoSQL, would it even be efficient or would simply going back to using a tradition database retrieve this type of information faster?
推荐答案
MongoDB是我知道的唯一支持地理空间索引的NoSQL数据库。如果您使用的是MongoDB，您应该查看文档，但基本上您将创建一个地理空间索引：
MongoDB is the only NoSQL database I know of that supports geospatial indexes. If you're using MongoDB, you should look at the documentation, but basically you'd create a geospatial index with:
db.houses.ensureIndex({house : "2d"})
您可以插入点：
db.houses.insert({house : {latitude : y, longitude : x}})
b $ b
然后使用以下命令查询它：
and then query for it with:
db.houses.find({house : {$within : {$box : [[xxx, yyy], [www, zzz]]}}})
MongoDB还允许您在给定的半径范围内搜索，并且只为最接近的点匹配。
MongoDB also lets you search within a given radius and just for the nearest matches to a point.
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