气象与环境学报2013，Vol.29Issue(3)：97-101,5.DOI:10.3969/j.issn.1673-503X.2013.03.016
降水格点数据的无损压缩方法
A lossless compression scheme for precipitation grid data
摘要
Abstract
Grid data is one of the important forms for the storage and exchange of the meteorological data.An effficient compression scheme is very important for the data compression,and a compression scheme must be lossless for the meteorological data.Precipitation is a special element because of its spatial and temporal discontinuity,so the lossless compression scheme used for those continuous elements is not suitable to the precipitation data.The fundamental features of the precipitation grid data were analyzed.Basing on the run length encoding (RLE) and Shuffle encoding as well as entropy encoding,a new lossless compression scheme was presented for precipitation grid data.The results show that the compression efficiency of the new scheme is high and it can greatly save storage space and the transmission time.The compressed data are completely lossless within available precision,so this scheme can be used for other meteorological elements with spatial and temporal discontinuity and has great practical application in meteorology.关键词
降水量/格点数据/行程编码/无损压缩Key words
Precipitation/ Grid data /Run length encoding/ Lossless compression分类
天文与地球科学引用本文复制引用
罗坚,姜勇强,戴彩悌..降水格点数据的无损压缩方法[J].气象与环境学报,2013,29(3):97-101,5.基金项目
国家自然科学基金"热带气旋螺旋带波动性质的研究"(40905021)资助. （40905021）
