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Introduction

This is a fork of simplelatlng in google code, but this is not the official fork, the source code originate from Sources 1.3.0, so from that point on, any updates in google code may not merge into this project.

Feature

1. an object to represent a Latitude/Longitude point,
2. methods to calculate the approximate distance between two points,
3. classes that specify windows of varying shapes for testing whether or not a point lies within the window,
4. a Geohash implementation.
5. transcode the point in china

5th Feature is totally new!