flutter pub add dart_geohash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。
一个轻量级的 Dart 包，用于将地理坐标编码和解码为 geohash，以及查找相邻的 geohash。通过将纬度和经度对转换为紧凑的字符串表示，该包实现了高效的时空索引和邻近查询。该包支持所有主要平台，非常适合需要快速地理空间操作的应用程序，例如基于位置的服务或地图聚类。
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。
GeoHash is a simple way of storing a latitude/longitude location as a simple string.
Includes a Class for encode/decode and finding neighbors as well as a Class that can be given a location and will contain all needed information for that GeoHash.
// Create a simple geohash from a given string
GeoHash myHash = GeoHash("9yf0zhhtj");
// Immediately be able to get all other information related to it
myHash.geohash;
myHash.longitude();
myHash.latitude(decimalAccuracy: 4);
myHash.neighbors; // Returns a Map with itself and 8 surrounding neighbors
myHash.neighbor(Direction.NORTH);
// You can also create it from a specific lon/lat
GeoHash myOtherHash = GeoHash.fromDecimalDegrees(-98.1235, 38.1234);
// Separately you can use only the Geohasher functions
GeoHasher geoHasher = GeoHasher();
geoHasher.encode(-98, 38); // Returns a string geohash
geoHasher.encode(-98, 38, precision: 6) // Returns string geohash with length
geoHasher.decode("9yf0zhhtj"); // Returns decimal longitude/latitude
geoHasher.neighbors("9yf0zhhtj"); // Returns itself and 8 neighbors as a Map
Based on the Python Package Mapzen GeoHash