| 摘要 |
A method and apparatus for reformatting terrain data that in turn increases compressibility of the terrain data. The method includes storing each sample of terrain data as a signed integer offset in hundreds of feet from a previous sample of terrain data; compressing the each sample of terrain data using RLE compression; and further compressing each sample of terrain data using Huffman compression. The signed integer offsets may be mapped to unsigned integer offsets from a minimum elevation to further reduce storage requirements.
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