Open quarries are at the same time a necessity but also a source of pollution. Necessity as they supply the necessary fuel
for energy production and source of pollution as they affect biodiversity, vegetation cover and threaten water resources.
The objective of this work is to indicate a monitoring methodology using Landsat ETM SLC off imagery. On May 31,
2003, the Scan Line Corrector (SLC), which compensates for the forward motion of Landsat 7, failed. Without an
operating SLC, the Enhanced Thematic Mapper Plus (ETM+) line of sight now traces a zig-zag pattern along the satellite
ground track. As a result, imaged area is duplicated, with width that increases towards the scene edge. An estimated
twenty-two percent of any given scene is lost because of the SLC failure. The maximum width of the data gaps along the
edge of the image would be equivalent to one full scan line, or approximately 390 to 450 meters. The precise location of
the missing scan lines will vary from scene to scene. In this study a gap filling technique for Landsat ETM SLC off
imagery is evaluated. Different Landsat 7 ETM+ images SLC off were restored and then compared to historical data and
data from other sensors. The restored images have been used in order to monitor the expansion of an open quarry in
western Peloponnese and the results are presented.