一种基于HJ-1卫星影像的经纬度快速插值算法

摘要

随着国内学者对HJ-1卫星影像研究和使用的深入,HJ-1卫星影像数据在各个领域的应用逐渐成熟。目前用户下载到的HJ-1卫星影像的定位数据只有少量样本点经纬度,而很多情况下用户需要得到每个像元的经纬度信息。本文针对HJ-1卫星影像数据的特点,提出并利用IDL实现了一种具有针对性的快速插值算法,从而使HJ-1影像的每个像元都具有经纬度定位信息。%HJ-1 satellite images are used in many fields for researching and producing, but there is only a little locating information contained in HJ-1 satellite images, which is a huge limit of application. In the most of cases, the users want to get the location information for each pixel, so we need to interpolate the longitude and latitude. In this paper, we analyze the Characteristics of the longitude and latitude information contained in HJ-1 satellite images, and present a fast interpolating scheme for longitude and latitude of HJ-1 satellite images, and realize it with the Interactive Data Language.