|
The aim of this study was to investigate the possible use of geotechniques and generally available geodata for mapping land cover on reclaimed areas . The choice of subject was dictated by the growing number of such areas and the related problem of restoring their value. The validity of the use of modern technology, including GIS, photogrammetry and remote sensing, was determined, especially for the land cover classes mapping that are relevant in assessing the effects of reclamation and analyzes of the changes taking place on such sites. The study was performed for dump site of the Sulphur Mine "Machów", which is an example of the reclaimed area, located in the Tarnobrzeski district. The research materials consisted of aerial orthophotos, which were the basis of on-screen vectorization of land cover classes; Landsat satellite images, which were used in the pixel based classification; and the CORINE Land Cover database as a general reference to the global maps of land cover and land use. The site was characterized by relatively large mosaic of landscape which is typical for reclaimed areas. Due to this fact, high resolution aerial photos were most suitable for the land cover mapping, allowing distinguishing highest number of land cover classes. The process was also successfully automated with the means of pixel-based image classification on the satellite images. This resulted also in the subjectivity of the operator and time costs. The effort made to develop land cover classes, supported with thorough knowledge of the operator, is important for the proper evaluation of the reclamation process.
|