A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ
A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ A OPEN PIT MINING AÇIK OCAK MADENCİLİĞİ
Figure 3. The UAV multirotor platform assembled with OEM electronic components (by Mikrokopter HiSystems GmbH) with Ground Station control unit and waypoints of the flight plans pre-elaborated with “GeoMapTool 4.0” (by Alex Demeo) for “MikroKopterTool. 1) Preliminary flight plan, 2) Complete Nadiral flight plan and 3),4) vertical flight plans. 4 DEM-ORTHO PROCESSING During the last years, in the field of close-range photogrammetry, the techniques of automatic aerial triangulation (AAT - namely the correct identification of a number of bonding points between the images) have been improved. 88
23 rd As mentioned abobe, the aerial images taken over the quarry were processed with PhotoScan software by AgiSoft LLC. According to Verhoeven (2011) for a good 3D reconstruction the photos have been taken as perpendicular as possible to the surfaces. The “dense stereo matching” algorithm supported by PhotoScan (called Exact, Smooth, Height Field and Fast) has been used during data elaboration, allowing an optimal result in our DSMs generation (Fig. 4). In the aerial photogrammetry the use of “Height Field” and “Exact method” features are particularly recommended to obtain the best reconstruction of the terrain surface characteristics. It’s very interesting how new aerial images can be added or deleted at any time of the elaboration to obtain the best composition for a georeferenced orthomosaic, or the best definition of DSMs and DEMs. The DMSs surfaces were reconstructed using a automatic or semi-automatic procedure, with very dense point clouds. Finally we have realized 3 DMSs models of the quarry with 2.651 points square meters, automatically created from the image pairs. Figure 4. Screenshots of Photoscan interface with some point clouds generated. The result of the elaboration is a very good geometry representation with RGB value extracted from the photos, giving to the point clouds a realistic textured appearance (Tab. 2). 89
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- Page 135 and 136: 23 rd 6 THE HIERARCHICAL PREFERENC
- Page 137 and 138: 23 rd ranking place Truck & Shovel
Figure 3. The UAV multirotor platform assembled with OEM electronic components (by<br />
Mikrokopter HiSystems GmbH) with Ground Station control unit and waypoints of the flight<br />
plans pre-elaborated with “GeoMapTool 4.0” (by Alex Demeo) for “MikroKopterTool.<br />
1) Preliminary flight plan, 2) Complete Nadiral flight plan and 3),4) vertical flight plans.<br />
4 DEM-ORTHO PROCESSING<br />
During the last years, in the field of<br />
close-range photogrammetry, the<br />
techniques of automatic aerial triangulation<br />
(AAT - namely the correct identification of<br />
a number of bonding points between the<br />
images) have been improved.<br />
88
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