1. GPS
GeoHash
ke-tai.org

2. •
•
ke-tai.org
•

4. GeoHash
•
• +141.22.35.364, +43.3.14.112
↓ ↓ ↓
xpssbxt2gpf

5. GeoHash (2)
•
•
xpssbxt2 8 xpssbx 6

6. GeoHash (3)
•
xpst08

7. (1)
•
•
SQL like
lon > 141.22345 AND lon < 141.23124 AND lat > 43.41228AND lat < 143.42.097
↓ ↓ ↓
geohash LIKE ‘xpssbxt2%’

8. (2)
•
URL
foo.php?lon= 141.22345&lat= 43.41228&zoom=12
↓ ↓ ↓
bar.php?gh=xpssbxt2
• Perl, PHP, Ruby, Java, JavaScript
→ LOCAL riaf PHP
http://blog.riaf.jp/post/378886859/geohash-php

9. • →
1. base32
2. 2 (5bit)
3. bit( ) bit( )
4.
• URL
http://d.hatena.ne.jp/yuroyoro/20100115/1263526125

10. GeoHash
•
•
Web