About GeoHex

Sep 5, 20103 likes1,382 views

GeoHex is a hexagonal mapping and geocoding system that provides more precise location data than standard latitude-longitude coordinates. It divides the globe into a hex grid reference system with codes that are shorter than other methods and allows for flexible precision at different zoom levels on maps like Google Maps. GeoHex aims to make location data sharing and distance calculations easier compared to traditional methods. It is an open source project available under a Creative Commons license, with code libraries provided for various programming languages.

GeoHex
@sa2da #geohex
http://geohex.net/

2010 9 6

Covering for all locations
on GoogleMaps.

2010 9 6

Why GeoHex?

VS

Not GeoHex GeoHex

2010 9 6

01

Cool interface
match for geogames

not cool
So Coooooooooool!!!
2010 9 6

02

Equal in distance with
adjoinings

1 : 1.41 1:1
2010 9 6

03

Similar to round shape

large crack small crack
2010 9 6

04

Flexible size in many ways
linked with GoogleMaps’ zoom scale

Level:0 Level:24
2010 9 6

05

Short codeing system

20 byte
3 - 11 byte
2010 9 6

$06 Easy to calculate distance function getDistance(_x1,_y1, _x2,_y2) { _x2 = _x2 * Math.PI / 180.0; _y2 = _y2 * Math.PI / 180.0; _x1 = _x1 * Math.PI / 180.0; _y1 = _y1 * Math.PI / 180.0; var dx=_x2-_x1; var dy=_y2-_y1; var A = 6378137; // (6378137m) A.x - B.x var x = A * (dx) * Math.cos( _y1 ); var y = A * (dy); var old_exp = exp; dy=Math.log(Math.tan(Math.PI/4+_y2/2))-Math.log(Math.tan(Math.PI/4+_y1/2)); var rad=((dy>=0) ? 1:-1)*Math.acos(dx/Math.sqrt(dx*dx+dy*dy))*180.0/Math.PI; var tmpdist = Math.round(Math.sqrt(x*x + y*y)); totaldist = totaldist + tmpdist; distcnt(); } 2010 9 6$

07

Easy to share route data

35.661960,139.697900
132KpxU
35.660093,139.701741 2
.
. 3
.
. 2
. .
. .

20 × (n) byte 7 + (n) byte
2010 9 6

08

Save privacy
ex) for

Lunch here
sa2da
Lunch here
sa2da

pinpoint
vague
2010 9 6

01

Map tiles for geogames

kokogiko sa2da

2010 9 6

02

Easy mehod substitute
for round search

2010 9 6

05

Search system along tracks

2010 9 6

06

Step-counting system
for GPS tracking

11/40

START GOAL
1.4km 5.2km
2010 9 6

GeoHex is Open-Project

Creative Commons License

2010 9 6

Several libraries are provided

Perl
kokogiko
Ruby / GitHub
hal_sk
AS3
calcul_omikan

http://github.com/geohex/ Android’s
GeoHexV1

2010 9 6

GeoHex
Contact:
@sa2da #geohex
sa2da@geohex.net

2010 9 6

This document discusses GeoHex, a geospatial indexing system that divides geographic space into hexagonal cells identified by alphanumeric codes. It explains how GeoHex works, compares it to other systems like latitude/longitude, shows examples of encoding locations as GeoHex codes, and outlines how it can be implemented in applications using JavaScript and APIs. The document provides an overview of GeoHex and how it represents a more efficient alternative to other geospatial data standards.

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Geohex at Off4g2009Tadayasu Sasada

GeoHex is a geocoding format that represents geographic locations as alphanumeric strings (hexcodes) for use in games, tracking, and other location-based applications. It offers advantages over traditional latitude-longitude coordinates by using shorter, privacy-preserving codes that are flexible in size and easy to use for calculating distances and routes between locations. The document provides examples of how GeoHex codes work and can be implemented in applications.

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GeoHex is a hexagonal mapping and geocoding system that assigns unique alphanumeric codes to geographic locations at varying levels of granularity. It offers advantages over traditional latitude/longitude coordinates by being shorter, protecting privacy, and allowing flexible precision. Version 2 extends worldwide coverage, uses a consistent cell size at all latitudes, introduces a new coding system, and supports coordinate transformations and open development.

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About GeoHex

1. GeoHex @sa2da #geohex http://geohex.net/ 2010 9 6

2. What’s GeoHex? 2010 9 6

3. Hex-Mapping Pattern 2010 9 6

4. GeoCoding System 2010 9 6

5. Covering for all locations on GoogleMaps. 2010 9 6

6. Why GeoHex? VS Not GeoHex GeoHex 2010 9 6

7. 01 Cool interface match for geogames not cool So Coooooooooool!!! 2010 9 6

8. 02 Equal in distance with adjoinings 1 : 1.41 1:1 2010 9 6

9. 03 Similar to round shape large crack small crack 2010 9 6

10. 04 Flexible size in many ways linked with GoogleMaps’ zoom scale Level:0 Level:24 2010 9 6

11. 05 Short codeing system 20 byte 3 - 11 byte 2010 9 6

12. 06 Easy to calculate distance function getDistance(_x1,_y1, _x2,_y2) { _x2 = _x2 * Math.PI / 180.0; _y2 = _y2 * Math.PI / 180.0; _x1 = _x1 * Math.PI / 180.0; _y1 = _y1 * Math.PI / 180.0; var dx=_x2-_x1; var dy=_y2-_y1; var A = 6378137; // (6378137m) A.x - B.x var x = A * (dx) * Math.cos( _y1 ); var y = A * (dy); var old_exp = exp; dy=Math.log(Math.tan(Math.PI/4+_y2/2))-Math.log(Math.tan(Math.PI/4+_y1/2)); var rad=((dy>=0) ? 1:-1)*Math.acos(dx/Math.sqrt(dx*dx+dy*dy))*180.0/Math.PI; var tmpdist = Math.round(Math.sqrt(x*x + y*y)); totaldist = totaldist + tmpdist; distcnt(); } 2010 9 6

13. 07 Easy to share route data 35.661960,139.697900 132KpxU 35.660093,139.701741 2 . . 3 . . 2 . . . . 20 × (n) byte 7 + (n) byte 2010 9 6

14. 08 Save privacy ex) for Lunch here sa2da Lunch here sa2da pinpoint vague 2010 9 6

15. GeoHex for what? 2010 9 6

16. 01 Map tiles for geogames kokogiko sa2da 2010 9 6

17. 02 Easy mehod substitute for round search 2010 9 6

18. 03 Search system at degrees 2010 9 6

19. 04 For statistic systems 2010 9 6

20. 05 Search system along tracks 2010 9 6

21. 06 Step-counting system for GPS tracking 11/40 START GOAL 1.4km 5.2km 2010 9 6

22. How to use GeoHex 2010 9 6

23. GeoHex is Open-Project Creative Commons License 2010 9 6

24. Several libraries are provided Perl kokogiko Ruby / GitHub hal_sk AS3 calcul_omikan http://github.com/geohex/ Android’s GeoHexV1 2010 9 6

25. URL: http://geohex.net 2010 9 6

26. GeoHex Contact: @sa2da #geohex [email protected] 2010 9 6

About GeoHex

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