https://github.com/nikotron/geohex

Dart implementation of GeoHex encoding
https://github.com/nikotron/geohex

dart flutter geocoder geocoding geocoding-library geohex geospatial pubspec

Last synced: 2 months ago
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Dart implementation of GeoHex encoding

• Host: GitHub
• URL: https://github.com/nikotron/geohex
• Owner: NiKoTron
• License: mit
• Created: 2019-08-11T13:29:05.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2022-01-27T21:51:07.000Z (almost 3 years ago)
• Last Synced: 2024-11-15T06:33:28.684Z (2 months ago)
• Topics: dart, flutter, geocoder, geocoding, geocoding-library, geohex, geospatial, pubspec
• Language: Dart
• Homepage: https://pub.dev/packages/geohex
• Size: 116 KB
• Stars: 3
• Watchers: 3
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md

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README

        
# GeoHex for Dart

[![pub package](https://img.shields.io/pub/v/geohex.svg)](https://pub.dartlang.org/packages/geohex) [![Coverage Status](https://coveralls.io/repos/github/NiKoTron/geohex/badge.svg?branch=master)](https://coveralls.io/github/NiKoTron/geohex?branch=master) [![Build Status](https://travis-ci.org/NiKoTron/geohex.svg?branch=master)](https://travis-ci.org/NiKoTron/geohex)

Implementation of `geohex.org` encoding for Dart language.

## Usage

Encoding example:

```dart

import 'package:geohex/geohex.dart';

main() {

  //Location of Capetown

  final geoHexCode = GeoHex.encode(-33.91522085, 18.3758784, 4); //OM4138

}

```

Decoding example:

```dart

import 'package:geohex/geohex.dart';

main() {

  //Geocode of Capetown

  final geoHexZone = GeoHex.decode('OM4138'); // instance of Zone with lat -33.91522085 lon 18.3758784 and level 4

}

```

## Note

This realisation has some difference with the original lib. It's location clamping. Original `geohex.org` uses `double` representation of lat'n'lon, so theoretically, it should take more precision etc. but in fact, it leads to errors.

Refer to this - [decimal degrees](https://en.wikipedia.org/wiki/Decimal_degrees), eight points after dot the should be enough for everything.