基于HDF4格式的MODIS 1B影像数据读取的算法研究

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

本文从HFD4的文件格式和HDF软件库的实现原理出发,介绍了MODIS 1B影像数据。介绍了MODIS 1B影像数据中两种主要的数据对象SDS(科学数据集)和Vdata(虚拟数据)。通过访问SDS的SD接口和Vdata的VS接口,结合HDF软件库实现对MODIS 1B数据的读取。

This article introduces the MODIS Level 1B data from a file format of HDF4 and the realization principle of HDF library.This article also introduces two data objects supported by HDF, namely, SDS （Scientific Data Set） and Vdata （Virtual Data）.By accessing the SD interface and the VS interface, the extraction of a MODIS Level 1B image with HDF library has successfully carried out.