Patent ID: 8457935

Claim:
A data processing method for sampling data from a plurality of sets of original data each varying over time, each of the sets of the original data being associated with each of a plurality of grid points arranged in an area, the method comprising: dividing the area into a plurality of blocks evenly so that each of the blocks encloses a plurality of grid points; calculating, executed by a computer, a variation rate of each set of the original data associated with each of the grid points included in each of the blocks; dividing at least one of the blocks into a plurality of sub-blocks evenly in accordance with the variation rate of said at least one of the blocks so that each of the sub-blocks encloses at least one of the grid points; calculating, executed by a computer, a variation rate of each set of the original data associated with each of the grid points included in each of the sub-blocks; and determining a frequency of sampling data associated with each of the grid points for the sub-blocks of said at least one of the blocks and for the rest of the blocks in accordance with the variation rate of the sub-blocks and said rest of the blocks.