Every MODIS Land Product includes Quality Assessment (QA) which/that provides pixel level quality information in order to achieve an informed application.However,QA are stored in a packed bit layer,which is good to save space yet bad to input it into traditional image processing systems.This paper explored major steps to decode packed QA for MODIS Vegetation Continuous Filed,using LDOPE tools,induding(1) Understand QA-related Scientific Data Set (SDS) based on specific MODIS land product,“cloud” for current case study; (2) Installations of LDOPE and MRT; (3) Mosaic,unpack,and restore QA in LDOPE,two ways were tested-single file and multiple file; (4) Map re-projection and file re-form in MRT; (5) Validate geo-location and QA attribute in ENVI.Through above processing,QA will be analyzed with relevant MODIS land products in pixel level.
NETL
NSTL
万方数据
维普
