ANALYSIS OF MULTILEVEL MEASUREMENTS OF SPECTRAL SIGNATURES FOR LESS FAVOURED AREAS
In the frame of the Agriculture and Land Use Activity, the JRC has undertaken research in order to widen and deepen an understanding of the potential role of remote sensing in less favoured areas (LFA) under several aspects. In the test site Ardeche (F), three sets of data are now available, i.e.: + Spectral signatures measured "in-situ"; + Airborne data taken from a BARNES 12-1000 radiometer; + TM satellite data. The analysis of recorded data has put in evidence the difficulties in comparing space and ground data owing to the heterogeneity of the spatial element from which they derive. The spectral signature concept is quite well defined at ground level while the spatial averaging effect becomes more important from higher view level (500 m) up to satellite level at which the effect due to mixed pixels can completely alter the results. The analysis will give a contribution to the understanding of the averaging effect and is intended to provide the actual limits of a reliable classification based on spectral signatures. After that, an attempt to develop the analysis on a multitemporal scale is also described.
Bibliographic Reference: 3EME COLLOQUE INTERNATIONAL "SIGNATURES SPECTRALES D'OBJETS EN TELEDETECTION", LES ARCS (FRANCE), DEC. 16- 20, 1985. WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32353 ORA
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Record Number: 1989124093300 / Last updated on: 1987-01-01
Available languages: en