%PDF-1.4 % 1 0 obj << /Type /Pages /Count 1 /Kids [ 2 0 R ] >> endobj 2 0 obj << /Type /Page /Parent 1 0 R /Resources << /ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ] /Font << /QuickPDFF5a2518c0 79 0 R /QuickPDFFbbd98586 125 0 R >> >> /Contents [ 5 0 R ] /MediaBox [ 0 0 595.2756 841.8898 ] /CropBox [ 0 0 595.2756 841.8898 ] >> endobj 3 0 obj << /Type /Catalog /Pages 1 0 R /Metadata 126 0 R >> endobj 4 0 obj << /Producer (Debenu Quick PDF Library 11.15 \(www.debenu.com\)) /Creator (Debenu Quick PDF Library 11.15 \(www.debenu.com\)) /CreationDate (D:20190516161944+02'00') /ModDate (D:20190516161944+02'00') >> endobj 5 0 obj << /Length 2663 /LC /iSQP >> stream 0 Tr /QuickPDFFbbd98586 14 Tf 0 0 0 rg 100 Tz 0 Tw 0 Tc 0 Ts BT 1 0 0 1 57.5238 770.8329 Tm (The Mapping Accuracy of Low-Cost UAV- Based Laser Scanner System: a Case)Tj 1 0 0 1 171.4348 752.1709 Tm (Study of Hokuyo UTM30lx Laser Scanner)Tj ET /QuickPDFFbbd98586 11 Tf 0 0 0 rg BT 1 0 0 1 146.0468 717.2179 Tm (Anh Thu Phan Thi \(Vietnam\) and Kazuyoshi Takahashi \(Japan\))Tj ET /QuickPDFFbbd98586 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 675.188 Tm 14.663 TL (Key words: )' ET /QuickPDFF5a2518c0 11 Tf 0 0 0 rg BT 1 0 0 1 141.7323 675.188 Tm 14.454 TL (Laser scanning; Low cost technology; Positioning; Laser scanner, UAV, accuracy, low)' (cost, positioning)' ET /QuickPDFFbbd98586 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 632.6683 Tm 14.663 TL (SUMMARY)' ET /QuickPDFF5a2518c0 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 604.3219 Tm 14.454 TL (A cheap, compact, light- weight UAV- based laser scanner system was developed. The developed system,)' (powered by Pin Lithium Polymer \(LiPo\), consists of a hex-rotor aircraft DJI S800 with the 3-axis gimbal)' (\(TAROT 5D\) carrying the Hokuyo UTM30LX laser scanner, an ultra-small motion logger \(Ninja Scan)' (Light\), GPS receiver and a single-board PC \(Raspberry Pi\). The test flights in Kumamoto prefecture had)' (been performed in 2014. The point clouds were collected with the setting of a 100^0 of field of view and)' (0.25^0 of angular resolution at the height of about 7 meters from the ground surface. There were 9)' (markers arranged within the study area. Their coordinates were measured with total station and used as)' (reference value for accessing the accuracy of generated 3D laser point clouds. The locations of markers were)' (identified, and their observed coordinates were manually measured from the intensity image of observation)' (data. By using magnetic data for determining flight direction and applying Helmert transformation with four)' (ground control points, the developed system could achieve a mapping accuracy of 0.04 m in both horizontal)' (and vertical direction. The results show the capability of generating a large- scale map with the low-cost)' (UAV- based laser scanner system. )' ET /QuickPDFF5a2518c0 10 Tf 0 0 0 rg BT 1 0 0 1 56.6929 163.8497 Tm 13.14 TL (__________________________________________________________________________________________)' ()' (The Mapping Accuracy of Low-Cost UAV- Based Laser Scanner System: a Case Study of Hokuyo UTM30lx Laser)' (Scanner \(9871\))' (Anh Thu Phan Thi \(Vietnam\) and Kazuyoshi Takahashi \(Japan\))' ()' (FIG Working Week 2019)' (Geospatial information for a smarter life and environmental resilience)' (Hanoi, Vietnam, April 2226, 2019)' ET endstream endobj 6 0 obj << /Length 316 /Filter /FlateDecode >> stream xMRKnCAۿSpk`y^Uu[jIɒT%C/:b}Rx\%=
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