Another key feature of cloud storage is geographic distribution of data (geographic scalability), allowing the data to be nearest the users over a set of cloud storage data centers (via migration).

The triangulation of constrained data set is widely used in Geographic Information System (GIS), geo-science, computational geometry, multi-resolution and high precision DTM, et al.

In the paper, elevation calculation models of division indexes were set up depending on the climatic and geographic data from 7 neighboring weather stations of Xunwu county.