Loading...
Please wait, while we are loading the content...
Similar Documents
Low Cost Surveying Using an Unmanned Aerial Vehicle
| Content Provider | Semantic Scholar |
|---|---|
| Author | Perez, Marco Agüera, Francisco Carvajal, Federico |
| Copyright Year | 2013 |
| Abstract | Traditional manned airborne surveys are usually exp ensive and the resolution of the acquired images is often limited. The main advantage of Unmanned Aerial Vehicle (UAV) system a cting as a photogrammetric sensor platform over mor e traditional manned airborne system is the high flexibility that allows image acquisition from unconventional viewpoints, the low cost in comparison with classical aerial photogrammetry and the high r esolution images obtained. Nowadays there is a nece ssity for surveying small areas and in these cases, it is not economical the use of normal large format aerial or metric cameras to acquire aerial photos, therefore, the use of UAV platforms can be very sui table. Also the large availability of digital camer as has strongly enhanced the capabilities of UAVs. The use of digital non metric cameras together with the UAV could be used for mu ltiple applications such as aerial surveys, GIS, wildfire mapping, stability of landslides, crop monitoring, etc. The aim of this work was to develop a low cost and accurate methodology in the production of ortho photos and Digital Elevation Models (DEM). The stud y was conducted in the province of Almeria, south of Spain. The photogramm etric flight had an altitude of 50 m over ground, c overing an area of 5.000 m 2 approximately. The UAV used in this work was the md 4-200, which is an electronic battery powered quadr ocopter UAV developed by Microdrones GmbH, Germany. It had on-board a Pex tax Optio A40 digital non metric camera with 12 Meg apixels. It features a 3x optical zoom lens with a focal range covering an les of view equivalent to those of 37-111 mm lens in 35 mm format. The quadrocopter can be programmed to follow a route de fined by several waypoints and actions and it has t e ability for vertical take off and landing. Proper flight geometry during image ac quisition is essential in order to minimize the num ber of photographs, avoid areas without a good coverage and make the overlaps homogeneous. The flight planning was done using th e MdCockpit software, with the module waypoint editor. Flight route file was downloaded into the quadrocopter autonomous chi p via cable. A total of twelve vertical images with a longitudinal and tran sversal overlapping of 60 % and 50 % respectively w ere taken. The digital camera was previously geometrically calibrated. Field cont r l points covering the whole studied area were def ined over the area of interest and their coordinates were measured by a GPS. Natur al targets were used as field control points. The c lose range photogrammetric software Photomodeler Scanner v.7 was used in this work to calibrate the camera and to carry out the p otogrammetric process. The software Golden Surfer was used to produce the DEM. The planimetric and the altimetric root mean squar e error (RMSE) were calculated in order to check the accuracy of the pr oducts. The RMSEx was 6 cm, the RMSEy was 4 cm and th e RMSEy was 7 cm. Our preliminary results demonstrate the feasibility and accuracy of orthophotos and DEMs obtained from images captured from a quadrocopter using low cost photogrammetric softwar e. A future work can be the comparison of the produ cts obtained following the route used in this study where the images are taken vertically with the products obtained with an orbi tal route where the number of images will be diminished and the photos will be ta ken oblique. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W2/311/2013/isprsarchives-XL-1-W2-311-2013.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Aerial photography Aerial survey Airborne Ranger Autonomous robot Base Excision Repair CCIR System A Calibration (statistics) Control point (mathematics) Count of entities Default route Digital camera Digital elevation model EXPTIME FOCAL (programming language) Geographic Information Systems Geographic information system Global Positioning System Laburnum Landslides Magnetoencephalography Mean squared error Oblique projection On-board data handling PHEX gene PhotoModeler Photogrammetry Planimetrics Plant Roots Power (Psychology) Published Comment Scanner Device Component Sonic user interface Unmanned aerial vehicle Waypoint photograph |
| Content Type | Text |
| Resource Type | Article |
