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All Journal JGISE-Journal of Geospatial Information Science and Engineering Geoid - Journal of Geodesy and Geomatics J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Azizi, Iqbal Hanun
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Transportation

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Pipeline Modeling using UAV LiDAR Technology Himawan, Iwan Qodar; Fitri, Listiyo; Widjajanti, Nurrohmat; Azizi, Iqbal Hanun
GEOID Vol. 19 No. 3 (2024)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v19i3.2271

Abstract

Pipelines play an important role in operations in energy supply companies, whether geothermal, gas, or petroleum. Pipeline damage, such as corrosion, dents, and leaks caused by natural or human factors, must be detected. Problems with pipeline assets will indirectly impact high production prices. Pipeline asset mapping must be carried out precisely, quickly, and quietly, considering that the existence of pipelines often causes social unrest. This research analyzed the capabilities of UAV LiDAR for mapping pipelines and support in a three km-long pipeline area. The study concluded that UAV LiDAR can map the position of the pipeline, its position to the ground, the position of the support, and the height of the support on a pipeline network with a diameter of 1 m. This capability applies not only to segments in open areas but also to those covered by vegetation. When orthophoto cannot display the pipeline's existence, the LiDAR point cloud can identify it. This main pipeline, which has a 1 m diameter, 3-D mesh, and 3-D models, can also be formed well. The accuracy of the resulting map is 11.5 cm at a confidence level of 90%. The length of time required from preparation to the presentation of the pipeline longitudinal profile map is eight calendar days with ten manpower.
Analisis Indeks Pencemaran Airtanah di DKI Jakarta dengan Interpolasi Spasial: Analysis of Groundwater Pollution Index in DKI Jakarta using Spatial Interpolation Prasetya, Dimas Ardi; Santikayasa, I Putu; Azizi, Iqbal Hanun
Jurnal Teknik Sipil dan Lingkungan Vol. 6 No. 3: Desember 2021
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.6.3.177-186

Abstract

Everyone needs water to his life and his activity. Groundwater pollution is one of the problems in Indonesia. The increasing number of the show an increase water needs. They were filled with groundwater needs. There has been decreasing groundwater that is occupied in quantity and quality. The research was done in Jakarta, consisting of 42 sub-district. Research takes into account the condition of the dry season. Uses index research quality of groundwater pollution. Monitoring parameter groundwater consisting of physics, chemical and biology paramater. The research consists of determining the pollution index in Jakarta, analysis of groundwater pollution, and predicted entanglement with an index pollution population density. The research uses spatial interpolation to determine locations. Pollution index calculation used calculation storet. The measurement results in the rate used in the analysis index groundwater pollution. The research results obtained index value has increased pollution are on the north and central of Jakarta. The research results obtained East Jakarta having the condition geology that porous. The value of the groundwater pollution index was in north Jakarta. The results of the study indicated by a map pollution index the quality of groundwater during three periods. Index pollution in Jakarta consisting of pollution until the same as the quality standard. Research shows the absence of correlation with the population with the pollution groundwater quality.
Elevation Accuracy Assessment of Aerial LiDAR against Total Station for Topographic Mapping under Diverse Terrain Conditions Azizi, Iqbal Hanun; Santosa, Purnama Budi; Sobasita, Fadila; Widjajanti, Nurrohmat
Jurnal Geospasial Indonesia Vol 8, No 2 (2025): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.111637

Abstract

Topographic mapping requires precise three-dimensional (3D) coordinates for geospatial applications. Conventional terrestrial surveys using Total Station (TS) and GNSS-RTK provide reliable accuracy but are time-consuming. Aerial LiDAR offers a faster alternative by generating high-density point clouds with wide coverage, although its accuracy must be evaluated. This study assesses the elevation accuracy of LiDAR compared to TS across six terrain categories: open ground surface, vegetation-covered surface, road section, sparsely populated settlement, densely populated settlement, and river. Data acquisition employed a 1 m grid to align horizontal coordinates and focused on elevation values. The evaluation included descriptive statistics, elevation difference histograms, Root Mean Square Error (RMSE), and linear correlation analysis. Results indicate that LiDAR achieved high accuracy in open ground and road sections, with low RMSE and correlation values equal to one. Accuracy decreased in settlements due to roof and wall reflections, and in dense vegetation where laser pulses were blocked by canopy. Despite these limitations, LiDAR effectively represented contour patterns after filtering, classification, and breakline addition. In rivers, LiDAR produced the largest deviations caused by water reflectivity, while TS remained precise for riverbed elevations. This study demonstrates that LiDAR is highly effective for mapping open areas and roads, applicable in settlements with further processing, and still useful in vegetated terrain through its multiple-return capability. However, water bodies require TS validation as a precision reference. Overall, LiDAR provides efficient wide-area data acquisition, while TS continues to serve as the precision standard in complex conditions under ISO/IEC 17025. The application of ISO/IEC 17025 is essential to ensure that measurement, calibration, and data validation comply with principles of accuracy, traceability, and uncertainty control, thereby making topographic mapping results accountable. 
Co-Authors Fitri, Listiyo Himawan, Iwan Qodar Nurrohmat Widjajanti Prasetya, Dimas Ardi Purnama Budi Santosa, Purnama Budi Santikayasa, I Putu Sobasita, Fadila