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Remote sensing for resources development and environmental management
Damen, M. C. J.

presence of some few indicator species or
have even been relatively homogenously
reformed by cattle grazing which led to
mutual misclassifications. A fusion of the
24 associations to only 16 classes let the
classification accurasy rise from 40 % to
80 %.
Within the present study once more it turned
out that object classes of geoscientific
maps can be automatically reclassified using
remote sensing data with very different
success. Some of the reasons for these
stronly diverging results are the following:
- poor geometrical quality of boundaries
of object classes;
- generosity in field mapping;
cartographic generalization;
- problematic spatial delimitation of
object classes and their topographic
neighbourhood (length and shape of
borderlines) ;
- different radiometric quality within one
- similarity of object classes in spectral
characteristics (feature space);
- changes between date of field mapping
and date of remote sensing data
selection of training areas;
- selection of classification algorithm;
- different suitability of remote sensing
as a measuring method for various object
- different empirical contents of
predominantly theory-derived categories;
different validity of indirect
conclusions from sensor-exposed surface
classes to subterraneous object classes;
allochthonous geo-ecosystems.
Based on our experiences we would like to
emphasize that the combined interpretation
of remote sensing data and thematic maps by
means of digital image processing is an
indispensable help in geoscientific and
geoecological studies. It is mainly two
applications which are of special interest.
One is the possiblity to relativize the
information derived from various sources in
a way, that as a final product more
plausible, more consistent and hence, more
reliable maps exist. This causes the
necessity to disclose the theoretical
reflections on the problems of thematic and
spatial delimitation of object classes and
thus to stimulate the examination and
development of geoscientific and ecological
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