栅格数据裁切范围检查的程序实现

摘要

正射影像、数字高程模型等栅格数据因其规则的存储形式、单一的数据内容，客观上有利于程序进行检查，同时，海量的栅格数据也要求开发程序进行自动检查。本文梳理归纳了地形图分幅和编号原则、图廓点坐标计算、高斯投影正算、栅格数据范围计算等知识点和数学公式。最后，在VC环境中采用GDAL开源库完成了栅格数据范围检查程序的编写并经实践验证正确有效，有助于提高栅格数据质量检查效率。%The grid data, such as DOM, DEM, are suitable for the implementation of the program .This article summarizes the topo-graphic map framing and numbering principle , according to the figure number to calculate latitude and longitude coordinates map bor -der points, positive operator Gauss projection , grid computing and other data scope knowledge and mathematical formulas .Finally, based on the GDAL library completed the preparation of grid data range checking procedures and validated in practice , help to improve the efficiency of the grid data quality checks and correct .