Based on Internet of things(IOT),we analyze and study the original grid-axes digital map.Firstly,in view of Gauss—Kruger projection,we present a simplified calculation model to realize the change between latitude coordinate and plane rectangular coordinate.Then,using a technology of grid index to map partitioning;we mainly discuss the relationship among grid number,computing,and accuracy.Finally,we present six tuples mathematical model with geography information storage.Meanwhile,we deposit geographic information of corporation house number ...