A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ
A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ
Table 2. Final results of data processing Ortomosaic and DEM Number of Orthomosaic and DEM: 3 Coverage area: 9.361 m2 GSDs:0.02-0.06 m/pix DEM Resolution: 0.06-0.10 m/pix Point density: 2.651 points m2 RMSE 0.278682 pix Some mesh editing has been required after automated processing to fill some “holes” and remove boundary errors. Finally, for each pixel have been assigned the spatial coordinates (x, y, z) and the truecolor information (RGB) in order to generate a fully textured 3D model. (Fig. 5) shows a complete reconstruction of the quarry investigated. The use of very dense clouds requires the decimation of the data points, in order to create valid DSMs. This technique works at is best with landforms with a high surface asperity and with a low vegetation cover. 5 CONCLUSION This work was aimed at the optimization of a method for low altitude photogrammetry with an UAV multirotor platform, for the creation of models DSM at consistent resolution. The proposed method results reliable, quick, accurate and safe. This is particularly indicated for abandoned mine sites, or wherever the access is limited by safety problems. During the data post-elaboration process a lot of information and measures have been carried out from the calculated geometrical shapes and landforms models. The results of this work constitute the basis for a future development, into a GIS environment, of a detailed terrain degradation analysis. The development of our research will provide the survey to the other quarries to realize a complete model of the M.te Porceddu mining area. The data analyses carried out by the application of this method constitute the required background for the elaboration of risk maps for the planning of a reclamation and restoration project. Figure 5. Orthomosaic and DEM of the test area (georeferenced in Gauss-Boaga) with contour map and over flow vectors. 90
23 rd REFERENCES Claessens L., Heuvelink G. B. M.,. Schoorl J. M and Veldkamp A., 2005, DEM resolution effects on shallow landslide hazard and soil redistribution modelling, Earth Surface Process and Landforms 30, pp. 461–477. Fadda S., Fiori M., Matzuzzi C., 2010, Developing Rehabilitation Design for the Abandoned Mine Excavations in Central Sardinia, Italy, International Journal of Surface Mining, Reclamation and Environment, pp. 286-306. Neitzel F., Klonowski J., 2011, Mobile 3d mapping a low-cost uav system. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol. XXXVIII-1/C22 UAV, Conference on Unmanned Aerial Vehicle in Geomatics, Zurich, Switzerland, pp. 1-6. Verhoeven G., 2011, Taking Computer Vision Aloft-Archaeological Threedimensional Reconstruction from Aerial Photographs with Photoscan, Arheological Proscpection 18, pp. 67-73 91
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REFERENCES<br />
Claessens L., Heuvelink G. B. M.,. Schoorl<br />
J. M and Veldkamp A., 2005, DEM<br />
resolution effects on shallow landslide<br />
hazard and soil redistribution modelling,<br />
Earth Surface Process and Landforms 30,<br />
pp. 461–477.<br />
Fadda S., Fiori M., Matzuzzi C., 2010,<br />
Developing Rehabilitation Design for the<br />
Abandoned Mine Excavations in Central<br />
Sardinia, Italy, International Journal of<br />
Surface Mining, Reclamation and<br />
Environment, pp. 286-306.<br />
Neitzel F., Klonowski J., 2011, Mobile 3d<br />
mapping a low-cost uav system.<br />
International Archives of the<br />
Photogrammetry, Remote Sensing and<br />
Spatial Information Sciences, Vol.<br />
XXXVIII-1/C22 UAV, Conference on<br />
Unmanned Aerial Vehicle in Geomatics,<br />
Zurich, Switzerland, pp. 1-6.<br />
Verhoeven G., 2011, Taking Computer<br />
Vision Aloft-Archaeological Threedimensional<br />
Reconstruction from Aerial<br />
Photographs with Photoscan,<br />
Arheological Proscpection 18, pp. 67-73<br />
91
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