英文:
Calculate location between users using firebase
问题
我将Firebase实时数据库与我的应用程序进行了链接，并添加了电子邮件登录功能。我希望能够看到附近（约1公里左右）的其他用户。我的最初想法是根据纬度和经度获取我的位置信息，并将其发送到Firebase。然后，当我登录时，我将扫描所有用户的位置，并将其与我的位置进行比较，以仅显示我附近的用户。但我认为这种做法非常不好。我的担忧是我需要扫描很多用户，并且在应用程序中存储所有用户的位置数据似乎存在很大的安全问题。我需要一种更好的方法来实现这一点。请提供建议，谢谢。
英文:
I linked firebase realtime database with my app and added login with email. I want to be able to see other users that are nearby(about 1 km). My original idea was to get my own location based on latitude and longitude and send it to firebase. Then when I log in I would scan all user's location and compare it to mine to show only those around me. It seems to me like a very bad idea to do it this way. My concerns are I would need to scan a lot of users and having all their location data in the app seems like a high security issue. I need a better way to do this. Any suggestions please?
答案1
得分: 0
也许可以将每个人的位置存储在大约2公里 x 2公里大小的“区块”中。
当客户端需要查看附近的其他用户时，向其发送所在区块以及相邻区块中用户的位置，然后让客户端进行最终计算，以确定它们是否在1公里半径内。
为了避免安全问题，限制客户端每分钟/每小时/每天可以请求的区块数量。
英文:
Maybe store each person location in "chunks" that are about 2km x 2km in size.
When a client need to see other users nearby, send him the location of users in his chunk + adjacents chunks and let the client do the final math to determine if they are in the 1km radius.
To avoid security issues, limit the number of chunks a client can request per minute/hour/day.
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