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APPLICATION OF COMPUTER AIDED ANALYSIS OF LANDSAT DATA TO
LAND USE STUDIES IN BELGIUM
The Ciergnon test site (Famenne)
A.Ceusters,R.Gombeer, H.Gulinck,N.Sougnez,J.D'Hoore
Laboratorium voor Bodemgenese en Bodemgeografie K.U.Leuven
Centrum voor Landbouwkundige en Ekologische Interpretatie
van Teledetektiegegevens (C.L.E.I.T. - I.W.O.N.L.)
Summary
The almost rectangular test site of 7 x 8 km (5.670 ha) is located in the
Famenne, a small natural region between the Condroz and the Ardennes.
Four land use categories have been retained: coniferous forest (Picea
abies dominant), deciduous forest (Quercus, Carpinus), grassland and
cultivated land. The two CCT's studied were recorded on 22/3/1973 and
17/5/1976.
Homogeneous test arcas the land use of which was correctly known were
located by means of the NMAPW (ORSER) programme. and spectral signatures
were statistically analysed by means of the STATS programme. This has
shown that in the Famenne, both in March and in May band 5 is the most
selective.
Radiance ranges for each category in band 5 were then introduced in the
EXIO programme, which produced a map according to preset radiance limits
and a distribution statistics, which was in close agreement with data
obtained by planimetry on the 1/25.000 NGI map.
The supervised classification programme CANAL, which makes use of the
four spectral bands, gave results that were rather similar to those pro-
duced by EXIO.
Introduction
The application of computer aided analysis of remote sensing data to rural
economy and regional planning problems presents some obvious advantages.
Besides the fact that much of the work can be automatized,maplike repre-
sentations can be generated which allow a rather exact positioning of pi-
xels on the terrain, at least in a well mapped country. ,Secondly,programmes
can be aimed at specific land use features at propitious times of the year,
and then yield good approximations of spatial distribution at the time of
the overflight.