tenten

README

go-tenten

package tenten implements

a coding system for entering any location on earth with 10m of accuracy using a 10 character code that includes features to prevent errors in entering the code. -- John Graham-Cumming

reference:

• http://blog.jgc.org/2006/07/simple-code-for-entering-latitude-and.html
• http://blog.jgc.org/2010/06/1010-code.html?

Documentation

Overview

package tenten implements "a coding system for entering any location on earth with 10m of accuracy using a 10 character code that includes features to prevent errors in entering the code." - purposed by john graham-cumming

reference:

http://blog.jgc.org/2010/06/1010-code.html?
http://blog.jgc.org/2006/07/simple-code-for-entering-latitude-and.html

benchmark on my i7

BenchmarkEncode		10000000	       174 ns/op
BenchmarkEncodeSlow	  500000	      4880 ns/op

Index

• Variables
• func Decode(tt string) (lat, lon float64, err error)
• func Encode(lat, lon float64) string

Variables

var (
	// ErrMalformedTT is returned if the 10:10 code is to short or missing spaces
	ErrMalformedTT = errors.New("10:10 code is to short or missing spaces")

	// ErrCorruptTT is returned if the 10:10 checksum is incorrect
	ErrCorruptTT = errors.New("10:10 checksum is incorrect")
)

Functions

func Decode

func Decode(tt string) (lat, lon float64, err error)

Decode takes a 12 charachter string and converts them to latitude and longditude

func Encode

func Encode(lat, lon float64) string

Encode converts a (lat,lon) tuple to a human readable string

optimizations:

• using a fixed size array
• replace math.Mod() with integer modulo
• replaceing math.Floor with 0|(foo), to be pkg math-free (found here http://www.tapper-ware.net/blog/?p=112)