Branco is in Brazil, in the state of Acre, near the Peruvian border. The area
represented comprises 95km by 95km.
In the red channel the acquisition of 11 May 1992, and in the green channel
the data take of 15 June 1992 is displayed. The blue channel was used to emphasis
strong scatters (mainly main-made constructions). In this way white areas or
dots are targets of +1.8db or higher.
A fine geomorphologic pattern is appreciated. Two types of deforestation activity
can be recognized, large rectangular areas of typically some 20000 ha each,
expanding along main roads , and small irregular cuts that seems to following
The colors within the deforestation are due to regrowth of small plants (green)
or due to clearing from such regrowth after the rainy season (red). Note also
some small clearings along roads and larger areas away from the roads appearing
in a darker yellow. These areas are likely to be abandoned clearings and thus
The map of the area dated from 1972 only shows minor deforestation along the
route towards northwest, not extending more than 3 km from the road, today the
big L-shaped clearing reaches as far as 13km into the virgin forest.
ERS Data Utilization Section, ESA/ESRIN
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,