Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B1, 893-899, 2016
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B1/893/2016/
doi:10.5194/isprs-archives-XLI-B1-893-2016
 
06 Jun 2016
ASSESSMENT OF THE QUALITY OF DIGITAL TERRAIN MODEL PRODUCED FROM UNMANNED AERIAL SYSTEM IMAGERY
M. Kosmatin Fras1, A. Kerin2, M. Mesarič3, V. Peterman3, and D. Grigillo1 1University of Ljubljana, Faculty of Civil and Geodetic Engineering, Jamova cesta 2, 1000 Ljubljana, Slovenia
2Andrej Kerin, Kolodvorska 20a, 1000 Ljubljana, Slovenia
3Modri Planet d.o.o, Vojkova cesta 45, 1000 Ljubljana, Slovenia
Keywords: Unmanned Aerial Systems, Aerial Imagery, Digital Terrain Model, Assessment of Quality, Application Abstract. Production of digital terrain model (DTM) is one of the most usual tasks when processing photogrammetric point cloud generated from Unmanned Aerial System (UAS) imagery. The quality of the DTM produced in this way depends on different factors: the quality of imagery, image orientation and camera calibration, point cloud filtering, interpolation methods etc. However, the assessment of the real quality of DTM is very important for its further use and applications. In this paper we first describe the main steps of UAS imagery acquisition and processing based on practical test field survey and data. The main focus of this paper is to present the approach to DTM quality assessment and to give a practical example on the test field data. For data processing and DTM quality assessment presented in this paper mainly the in-house developed computer programs have been used. The quality of DTM comprises its accuracy, density, and completeness. Different accuracy measures like RMSE, median, normalized median absolute deviation and their confidence interval, quantiles are computed. The completeness of the DTM is very often overlooked quality parameter, but when DTM is produced from the point cloud this should not be neglected as some areas might be very sparsely covered by points. The original density is presented with density plot or map. The completeness is presented by the map of point density and the map of distances between grid points and terrain points. The results in the test area show great potential of the DTM produced from UAS imagery, in the sense of detailed representation of the terrain as well as good height accuracy.
Conference paper (PDF, 1241 KB)


Citation: Kosmatin Fras, M., Kerin, A., Mesarič, M., Peterman, V., and Grigillo, D.: ASSESSMENT OF THE QUALITY OF DIGITAL TERRAIN MODEL PRODUCED FROM UNMANNED AERIAL SYSTEM IMAGERY, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B1, 893-899, doi:10.5194/isprs-archives-XLI-B1-893-2016, 2016.

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