Community Research and Development Information Service - CORDIS

Abstract

The Global Rain Forest Mapping Project GRFM is an international collaborative effort initiated and managed by the National Space Development Agency of Japan 9NASDAO. The main goal of the project is to produce a high resolution wall to wall map of the entire tropical rain forest domain in four continents using the L-band SAR IB BOARD THE jers-l spacecraft. In this paper we report on the solutions adopted in the GRFM Africa mosaic development, and discuss some quantitative and qualitative aspects related to the characterization and validation of the GRFM products. In particular the mosaic geo-location and its validation 'are discussed in detail; indeed the internal geometric consistency (sub-pixel accuracy in the co-registration of the two dates), and the absolute geo-location (residual mean squared error of 240 m with respect to ground control points) are key features of the GRFM Africa mosaic. Other important aspects that are discussed are the multi-resolution decomposition approach, which allows for tracking the evolution of natural phenomena with scale; the internal semi-automatic radiometric calibration, which minimizes artefacts in the mosaic; the thematic information content for vegetation mapping, which is illustrated by a few examples elaborated by visual interpretation. Experience gained so far indicates that the GRFM products constitute an important source of information for global environmental studies.

Additional information

Authors: DE GRANDI G, JRC-Space Applications Institute, Global Vegitation Monitorin Unit, Ispra (IT);MAYAUX M, JRC-Space Applications Institute, Global Vegitation Monitorin Unit, Ispra (IT);RAUSTE Y, JRC-Space Applications Institute, Global Vegitation Monitorin Unit, Ispra (IT);ROSENQVIST A, JRC-Space Applications Institute, Global Vegitation Monitorin Unit, Ispra (IT);SIMARD M, Jet Propulsion Laboratory, Pasadena Claifornia (US);SAATCHI S.S, Jet Propulsion Laboratory, Pasadena Claifornia (US)
Bibliographic Reference: An article published in: IEEE Transactions on Geoscience and Remote Sensing, vol.38 No.5 Sept.(2001) pp2218-2233
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top