a~y2514 a,aa,aaa,aaaa,aaab,aaac, ……,b,ba,baa,baaa,baab,baac……,yyyw,yyyx,yyyya Index0aaIndex1aaaIndex2 Index. 1024 ID[1,1024]32unsignedint1024 IDID IDID 10ID[1,1024] -1 1000 10,210,(5,5),(3,7) geohashgeohash base32 [-90,90] 6 80 1)[-90,90][-90,0),[0,90]801 2)[0,90][0,45),[45,90]801 3)[45,90] [45,67),[67,90],801 4)[67,90][67,78),[78,90]801 5)[78,90][78,84),[84,90]800 6)[78,84)[78,81),[81,84)800 geohashgeohash base32 [-。。。。。 。以下内容略