flutter pub add google_polyline_algorithm基于插件公开信息、社区数据与项目使用情况整理的选型参考。
Google 的 Polyline 编码算法的 Dart 实现，用于将纬度和经度坐标压缩为紧凑的字符串格式。这种有损压缩可减少地图路径的数据大小，非常适合在地理定位应用中高效传输和存储。该包支持所有主要平台，包括 Android、iOS、Web、macOS、Windows 和 Linux。它使开发者能够以最小的开销编码和解码折线，同时保持大多数地图使用场景所需的足够精度。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
Dart implementation of Googles Polyline Encoding lossy compression Algorithm.
This package adds following methods to work with Googles Polyline Encoding Algorithm:
encodePoint(num current, {num previous = 0, int accuracyExponent = 5}) encodes a single coordinate
encodePolyline(List<List<num>> coordinates, {int accuracyExponent = 5}) encodes a list of coordinates into an encoded polyline stirng
decodePolyline(String polyline, {int accuracyExponent = 5}) decodes an encoded polyline string into a list of coordinates
import 'package:google_polyline_algorithm/google_polyline_algorithm.dart';
final coord = encodePoint(-179.9832104);
print(coord);
// output is `~oia@'
final coords = encodePolyline([
[38.5, -120.2],
[40.7, -120.95],
[43.252, -126.453],
]);
print(coords);
// output is `_p~iF~ps|U_ulLnnqC_mqNvxq`@'
final polyline = decodePolyline('_p~iF~ps|U_ulLnnqC_mqNvxq`@');
print(polyline);
// output is [[38.5, -120.2],[40.7, -120.95],[43.252, -126.453],]