With the development of remote sensing technology

the size of terrain is growing rapidly

and far beyond the scope of main memory

has become an urgent problem.Data compression is a popular technology to increase system throughput.With the rapid development of GPU(Graphics Processing Unit) technology

the traditional compression algorithms cannot take full advantage of the ability of the current GPU.In this paper

we propose a GPU-based terrain data compression method

and achieve a high rate compression of terrain height field and location.Comparing to other algorithms

the main contribution of our algorithm is that the compression of terrain height filed and position is executed in the same time

and all the information of a node can be calculated according to the presentstrip.For terrain height domain

we firstly make Bezier curve approximation

then save the difference.After the steps above

we can achieve high compression ratio.By comparison with traditional methods

we get reasonable experimental results.