latlngconv

A Flutter package to convert latitude and longitude between WGS84, GCJ-02, BD-09, Web Mercator

  • 有偏移需要修正的地图: 百度地图、高德地图、搜狗地图、搜搜地图、谷歌地图(国内服务器)
  • 不需要修正的地图: 天地图、谷歌地球、谷歌卫星地图(国外服务器)、必应卫星地图和OpenStreetMap地图等

Basic usage

//convert wgs84 to gcj02
LatLng wgs = new LatLng(31.1695941, 121.3926092);
LatLng gcj = LatLngConvert(wgs, LatLngType.WGS84, LatLngType.GCJ02);

//convert gcj02 back to wgs84
LatLng wgs2 = LatLngConvert(gcj, LatLngType.GCJ02, LatLngType.WGS84);

//they are expect to nearly equal
// wgs == wgs2

Features and bugs

Please file feature requests and bugs at the issue tracker.

License

Copyright 2015 Michael Mitterer (office@mikemitterer.at),
IT-Consulting and Development Limited, Austrian Branch

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
either express or implied. See the License for the specific language
governing permissions and limitations under the License.

Libraries

latlngconv

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]