如何使用PHP或MySQL检查地理编码是否接近或位于KML LineString中定义的路径上 [英] How to check if geocode is close to or on path defined in a KML LineString with PHP or MySQL

问题描述

我有一个KML文件，定义了<LineString><coordinates></coordinates></LineString>标记中包含的若干路径/路线(代表实际道路).已将文件解析为其他格式(数组/MySQL)，所以这不是问题.

I have a KML file defining several paths/routes (representing actual roads) enclosed in the <LineString><coordinates></coordinates></LineString> tags. Parsing the file to other formats (arrays/MySQL) is already in place, so that's not a problem.

给出一个点(经度/纬度)，我希望能够检查该点是否在KML文件中的一条路线上或附近(几米之内).我一直在寻找PHP的解决方案，但一直没找到一个解决方案-而且我不确定，我在寻找什么.但是，在我看来，这确实是一个常见问题，因此我怀疑有人已经解决了该问题.有人知道解决方案吗? ;)

Given a point (longitude/latitude) I would like to be able to check if the point is on or close to (within a few meters) one of the routes in the KML file. I've been looking for a solution in PHP, but I haven't been able to find one - and I'm not really sure, what I'm looking for. This does however seem to me like a common problem, so I suspect someone already solved the problem. Does anybody know of a solution? ;)

提前谢谢！

推荐答案

您需要将其分解为两个问题:

You need to break this down into two problems:

• 从路径的每个部分生成一组多边形.
• 在多边形测试中对上述多边形做一个简单的点.

应该有一些php来完成这两个任务.

There should be some php out there to accomplish those two tasks.

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