Android的谷歌地图的经度和纬度融为一体pression [英] Android Google Map latitude and longitude compression

问题描述

我做的自行车路线跟踪一个应用程序。

I am doing one application for Track routes of bike.

我全部取每秒的经度和纬度。

I am fetching all the latitude and longitude per second.

现在我想的纬度和经度存储在我的本地数据库或服务器。但问题是，数据变得非常大。所以我想这些数据存储与优化，意味着我想同样的结果，但我想，以减少数据大小。

Now I want to store that latitude and longitudes in my local database or on server. But the problem is data becomes very large. So I want to store that data with optimization, means I want same result but I want to reduce data size.

请帮我，如果有人知道任何算法或任何东西。

Please help me, if anybody knows any algorithm or anything.

推荐答案

如果你想这样做，设备端，有一个由Android地图团队，其中包括一个方法来连接$ C创建一个开源的地图工具库经纬度的$ CA的对象集到 EN codeD折线字符串。

If you want to do this device-side, there is an open-source maps utility library created by the Android Maps team that includes a method to encode a set of LatLng objects into an encoded Polyline string.

Android地图utils的库项目：
https://github.com/googlemaps/android-maps-utils

Android Maps Utils library project: https://github.com/googlemaps/android-maps-utils

示例应用程序，展示了如何使用该库：
https://github.com/googlemaps/hellomap-android

Sample app that shows how to use the library: https://github.com/googlemaps/hellomap-android

在项目中使用这个库，然后调用 PolyUtil.en code（）法恩codeA集的经纬度对象转换成字符串，就可以在数据库中存储：
<一href=\"https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L68\" rel=\"nofollow\">https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L68

Use this library in your project, then call the PolyUtil.encode() method to encode a set of LatLng objects into a String, which you can store in your database: https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L68

然后，调用 PolyUtils.de code（）方法去code一组来自同一个String LatLng对象的：
<一href=\"https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L29\" rel=\"nofollow\">https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L29

Then, call PolyUtils.decode() method to decode a set of LatLng objects from the same String: https://github.com/googlemaps/android-maps-utils/blob/master/library/src/com/google/maps/android/PolyUtil.java#L29

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