Title :
Geolocation Assessment of MERIS GlobCover Orthorectified Products
Author :
Bicheron, Patrice ; Amberg, Virginie ; Bourg, Ludovic ; Petit, David ; Huc, Mireille ; Miras, Bastien ; Brockmann, Carsten ; Hagolle, Olivier ; Delwart, Steve ; Ranéra, Franck ; Leroy, Marc ; Arino, Olivier
Author_Institution :
CNES-BPI 2102, POSTEL/MEDIAS-France, Toulouse, France
Abstract :
The GlobCover project has developed a service dedicated to the generation of multiyear global land cover maps at 300-m spatial resolution using as its main source of data the full-resolution full-swath (300 m) data (FRS) acquired by the MERIS sensor on-board the ENVISAT satellite. As multiple single daily orbits have to be combined in one single data set, an accurate relative and absolute geolocation of GlobCover orthorectified products is required and needs to be assessed. We describe in this paper the main steps of the orthorectification pre-processing chain as well as the validation methodology and geometric performance assessments. Final results are very satisfactory with an absolute geolocation error of 77-m rms and a relative geolocation error of 51-m rms.
Keywords :
geophysical image processing; image registration; terrain mapping; ENVISAT satellite; GlobCover project; MERIS GlobCover orthorectified products; MERIS sensor; absolute geolocation error; full-resolution full-swath data; geolocation assessment; geometric performance assessments; image registration; multiple single daily orbits; multiyear global land cover maps; orthorectiflcation preprocessing chain; relative geolocation error; spatial coherence; spatial resolution; validation methodology; Accuracy; Earth; Geology; Instruments; Pixel; Satellites; Sea measurements; Image registration; land surface; spatial coherence;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2011.2122337
