基于HDF4文件格式的MODIS 1B影像数据提取的研究与实现

THE STUDY AND IMPLEMENTATION OF EXTRACTION MODIS LEVEL 1B IMAGE DATA BASED ON A HDF4 FILE

介绍了HDF4文件格式和HDF软件库的实现原理,分析了MODIS1B数据资料。在MODIS1B数据中主要有两种数据对象SDS和Vdata。文中详细介绍了访问SDS和Vdata数据的SD接口和VS接口,并通过调用HDF软件库分别实现了提取MODIS1B数据中SDS数据和Vdata数据。

This paper presents a file format of HDF4 and the realization principle of HDF library, analyzes the MODIS Level 1B data. Level 1B mainly uses two data objects supported by HDF, namely, SDS and Vdata. This paper also emphatically describes the SD interface and the Vdata interface. The extraction of a MODIS Level 1B image for the data of SDS and Vdata has been successfully carried out.