Munro, Duncan
4 CONCLUSIONS
The results obtained indicate that the continuity between the LANDSAT TM
sensor and the ETM+ sensor is very good. The two sensors provide completely
compatible data sets for the purposes of monitoring of land cover processes, geo-
logical mapping and surface temperature measurements. The results of super-
vised classification of the TM and ETM+ images are compatible with the land
cover maps produced by the Spanish Ministry of the Environment and as such
provide a possible source for land cover map updating. Further corroboration
with ground surveys would enhance the quality of the land cover maps.
The creation of image fusion products derived from the panchromatic and multi-
spectral data from the ETM+ sensor is greatly simplified in comparison to the
creation of similar products from LANDSAT multi-spectral images and SPOT
panchromatic images due to the simultaneous acquisition of both categories of
data. LANDSAT-7 image fusion products provide a means to produce maps at a
scale of 1: 50,000 and 1: 30,000 without any loss of detail
when compared with similar image fusion products pro-
duced from LANDSAT and SPOT imagery. However, the
cost of producing maps at these scales is greatly reduced
due to the wider coverage of the LANDSAT swath and
the process of image acquisition is greatly simplified
when a single data source is used.
Variability in relative surface temperatures within reser-
voirs adjacent to industrial discharge sources indicates
that detection of industrial activity is possible with
LANDSAT TM and ETM+ data. Absolute calibration of
the data and correlation between changes in absolute sur-
face temperature and levels of industrial activity would Figure 2. Temperature variability in the reserovoirs Embalse
evaluate improvements provided by the ETM+ data with de Arrocampo-Almaraz (above) and Embalse de Valdecañas
respect to TM data. : (scale approx. 1:140,000)
ACKNOWLEDGMENTS
LANDSAT data sets were provided by EURIMAGE S.p.A. in the frame of the “LANDSAT-7 Pilot Project”. The land
cover map was provided by the Spanish Ministry of Environment (Ministerio de Medio Ambiente - Secreteria de Estado
de Agua y Costas).
REFERENCES
Congalton, R. (1991). A review of assessing the accuracy of classifications of remotely sensed data. Remote Sensing of
Environment. 8(2): 137-155
EOSAT (1986). Landsat MSS and FM post-calibration dynamic ranges, exoatmospheric reflectances and at-satellite tem-
perature. Landsat Technical Notes, No.1, 8 pp
Gibbons, D.E. and Wukelic, G.E. (1989). Application of Landsat TM data for coastal thermal plume analysis at Diablo
canyon. Photogrammetric Engineering and Remote Sensing. 55(6): 903-909
Mather, P.M. (1989). Computer Processing of Remotely Sensed Images - An Introduction. J. Wiley & Sons, Chichester,
352 pp
Ministerio de Medio Ambiente (1998). Obtencion de Informacion Medioambiental Basica para una Gestion Racional de
los Recursos Hidricos, mediante Teledeteccion. Ref. n. Fondo de Cohesion 94.11.61.030, Secreteria de Estado de Agua y
Costas, 18 pp
938 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000.
