Geohex v2 at GMS_nagoya

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Geohex v2 at GMS_nagoya

  1. 1. GeoHex v2 @sa2da 2010.7.30 http://geohex.net/
  2. 2. What’s GeoHex ?
  3. 3. Hex-Mapping Model
  4. 4. GeoCoding System
  5. 5. Why GeoHex? VS No GeoHex GeoHex
  6. 6. Cool interface for GeoGames not cool So Coooooool!!!
  7. 7. Equal in distance 1 : 1.41 1:1
  8. 8. Save Privacy ex) for sa2da sa2da pinpoint vague
  9. 9. Short Code 20 byte 3 - 11 byte
  10. 10. Flexible Size Level:18 Level:16 Level:14 Level:0 Level:24
  11. 11. 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(); }
  12. 12. GeoHex for what? Communication Game Tracking Index GIS Search Statistics
  13. 13. What’s new in v2 ?
  14. 14. Extended Worldwide
  15. 15. Same size in every latitude same height fit map-chips
  16. 16. New code system Level:22 Level:16 Level:2
  17. 17. Simple URL http://geohex.net/quhzpUv
  18. 18. Coordinate transformed with PROJ.4 WGS84 Google Mercator
  19. 19. GeoHex is Open Project Creative Commons License Join github Perl kokogiko Ruby / GitHub hal_sk AS3 calcul_omikan http://github.com/geohex/
  20. 20. Thanks! Contact Documents http://geogames.net/

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