如何转换为Google编码的折线算法格式？ [英] How to convert to Google encoded polyline algorithm format?

问题描述

Google地图的编码多段线格式会将lat / lon信息以及缩放级别。

我有一个巨大的带有经度/纬度对的文本文件，我想要将它转换为这种格式和不同部分的折线（即我需要执行批量转换）

有谁知道执行此操作的代码？

解决方案

编码和解码多义线的权威性参考由Mark McClure教授在 http://facstaff.unca.edu/mcmcclur/GoogleMaps/EncodePolyline/

它包含了实用程序，讨论了在Perl，Ruby，PHP，Java和Mathematica中使用Javascript代码的算法和端口。注意：对于第3版，您不需要版本2所需的级别字符串。版本3为自己计算出级别。

The encoded polyline format for Google maps stores lat/lon information as well as zoom levels.

I have a huge text file with lat/lon pairs that i want to convert to this format and for different sections of polylines (i.e. i need to perform a batch conversion)

Does anyone know of a code that performs this operation ?

解决方案

The definitive reference to encoding and decoding polylines is by Professor Mark McClure, at http://facstaff.unca.edu/mcmcclur/GoogleMaps/EncodePolyline/

It contains utilities, a discussion of the algorithm and ports of the Javascript code into Perl, Ruby, PHP, Java and Mathematica.

Note: for Version 3, you don't need the levels string which is needed for Version 2. Version 3 works out the levels for itself.

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