Analisis Digital Terrain Model (DTM) pada Pengolahan Data dengan Metode Structure from Motion (SfM) dan Stereoplotting dari Data UAV Fotogrametri

Srimulyarini, Yenny (2025) Analisis Digital Terrain Model (DTM) pada Pengolahan Data dengan Metode Structure from Motion (SfM) dan Stereoplotting dari Data UAV Fotogrametri. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu metode untuk menghasilkan data Digital Terrain Model (DTM) dengan ketelitian tinggi adalah menggunakan teknologi fotogrametri baik melalui cara manual (interaktif) maupun otomatis. Penelitian ini dilakukan di Desa Selotapak, Kecamatan Trawas, Kabupaten Mojokerto dengan area seluas 17 hektar dengan topografi kelerengan yang curam. Penelitian ini diproses menggunakan metode Structure from Motion (SfM) dengan perangkat lunak Pix4D Mapper untuk ekstraksi secara otomatis dan metode stereoplotting menggunakan perangkat lunak Summit Evolution untuk proses ekstraksi manual. Dari pegolahan metode SfM diperoleh nilai Ground Sampling Distance (GSD) sebesar 2,87 cm/piksel, dengan nilai ketelitian geometrik berupa RMSEx sebesar 0,184 meter, RMSEy sebesar 0,110 meter, dan RMSEz sebesar 0,029 meter, sementara dari pengolahan metode stereoplotting diperoleh nilai RMSE horizontal (planimetris) sebesar 0,36070 meter dan RMSE vertikal (altimetris) sebesar 0,01691 meter. Hasil dari penelitian ini menunjukkan bahwa metode SfM memberikan visualisasi DTM yang halus dengan ketinggian DTM 603 meter hingga 710 meter dengan jumlah garis kontur sebanyak 140 garis, dari segi waktu metode SfM lebih efisien karena dapat diproses dalam hitungan jam (4 jam), namun pola kontur yang dihasilkan tidak memberikan visualisasi yang menyerupai objek sebenarnya di lapangan terutama pada elevasi yang tajam. Sementara, metode stereoplotting mampu memberikan representasi topografi yang menyerupai kondisi sebenarnya di lapangan dengan jumlah garis kontur sebanyak 277 garis dengan ketinggian DTM sebesar 669 meter hingga 739 meter. Kekurangan metode ini yaitu membutuhkan waktu yang cukup lama yaitu kurang lebih 2 minggu dan keterampilan operator untuk proses digitasi sangat dibutuhkan.
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One of the methods to generate high-accuracy Digital Terrain Model (DTM) data is by using photogrammetric technology, either through manual (interactive) or automatic approaches. This study was conducted in Selotapak Village, Trawas District, Mojokerto Regency, covering an area of 17 hectares with steep slope topography. The data were processed using the Structure from Motion (SfM) method with Pix4D Mapper software for automatic extraction, and the stereoplotting method using Summit Evolution software for manual extraction. From the processing using the SfM method, the Ground Sampling Distance (GSD) obtained was 2.87 cm/pixel, with geometric accuracy values of RMSEx 0.184 meters, RMSEy 0.110 meters, and RMSEz 0.029 meters. Meanwhile, the stereoplotting method resulted in a horizontal (planimetric) RMSE of 0.36070 meters and a vertical (altimetric) RMSE of 0.01691 meters. The results of this study show that the SfM method provides a smooth DTM visualization with elevation values ranging from 603 meters to 710 meters and a total of 140 contour lines. In terms of time, the SfM method is more efficient, as it can be processed within a few hours (4 hours). However, the resulting contour patterns do not accurately represent real-world objects in areas with steep elevation changes. On the other hand, the stereoplotting method is able to produce topographic representations that closely resemble actual ground conditions, with a total of 277 contour lines and DTM elevations ranging from 669 meters to 739 meters. The limitation of this method is that it requires a relatively long processing time of approximately 2 weeks and demands a high level of operator skill for the digitizing process.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	UAV Fotogrametri, Digital Terrain Model, Stereoplotting, Structure from Motion, UAV Photogrammetry, Digital Terrain Model, Stereoplotting, Structure from Motion.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography > GA105.3 Cartography. G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography > GA139 Digital Elevation Model (computer program) T Technology > T Technology (General) > T57.5 Data Processing T Technology > TA Engineering (General). Civil engineering (General) > TA1637 Image processing--Digital techniques. Image analysis--Data processing. T Technology > TA Engineering (General). Civil engineering (General) > TA590 Topographical surveying T Technology > TA Engineering (General). Civil engineering (General) > TA593 Orthophotography T Technology > TR Photography > TR810 Aerial photography
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Yenny Srimulyarini
Date Deposited:	23 Jul 2025 01:10
Last Modified:	23 Jul 2025 01:10
URI:	http://repository.its.ac.id/id/eprint/120624

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