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

Volume

49

Issue

8

fYear

2011

Firstpage

2972

Lastpage

2982

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;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2011.2122337

Filename

5771990