Geolocation Assessment of MERIS GlobCover Orthorectified Products

Bicheron Patrice (1) , Virginie Amberg (2) , Ludovic Bourg (3) , David Petit (2) , Mireille Huc (1, 4) , Bastien Miras (1) , Carsten Brockmann (5) , Olivier Hagolle (4, 6) , Steven Delwart (7) , Franck Ranera (8) , Olivier Arino (8)

1 MEDIAS FRANCE
2 Magellium
3 ACRI-ST - Analytic and Computational Research, Inc. - Earth Sciences
4 CESBIO - Centre d'études spatiales de la biosphère
5 Brockmann Consult
6 CNES - Centre National d'Études Spatiales [Toulouse]
7 ESTEC - European Space Research and Technology Centre
8 ESRIN - European Space Research Institute

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.

Mots clés: absolute geolocation error; ENVISAT satellite; full-resolution full-swath data; geolocation assessment; geometric performance assessments; geophysical image processing; GlobCover project; image registration; MERIS GlobCover orthorectified products; MERIS sensor; multiple single daily orbits; multiyear global land cover maps; orthorectiflcation preprocessing chain; relative geolocation error; terrain mapping

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]; Interfaces continentales, environnement; Milieux et Changements globaux

Bicheron Patrice, Virginie Amberg, Ludovic Bourg, David Petit, Mireille Huc, et al.. Geolocation Assessment of MERIS GlobCover Orthorectified Products. IEEE Transactions on Geoscience and Remote Sensing, 2011, 49 (8), pp.2972-2982. ⟨10.1109/TGRS.2011.2122337⟩. ⟨hal-00693592⟩