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All Journal Jurnal Inotera Geoid - Journal of Geodesy and Geomatics
Misfallah Nurhayati
Institut Teknologi Sumatera
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Kesesuaian Lahan SPBU di Bandar Lampung Menggunakan Sistem Informasi Geografis Vanisa Aufa Maharani; Meraty Ramadhini; Misfallah Nurhayati; Muhammad Ario Eko Rahadianto; Een Lujainatul Isnaini
Jurnal Inotera Vol. 8 No. 2 (2023): July - December 2023
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol8.Iss2.2023.ID276

Abstract

Bandar Lampung is identified as one of the densely populated urban center in Indonesia. As the population increases, the ownership of motorized vehicles using gasoline is also on the rise. This has led to a growth in the construction of fuel stations, which needs to be examined from various aspects, one of which is land suitability. This research aims to identify the distribution of fuel stations, determine the parameters used, and analyze the level of suitability of fuel stations in Bandar Lampung. The spatial data used in this study includes the National Spatial Plan of Bandar Lampung for the period 2021-2041 and the coordinates of fuel stations in Bandar Lampung. Additionally, non-spatial data such as questionnaire results and field validations are also utilized. The methods applied are the Analytical Hierarchy Process (AHP) and overlay. Based on the results obtained, there are 33 fuel station scattered across 17 out of 20 districts in Bandar Lampung and there are three districts that do not yet have fuel stations namely Tanjung Karang Barat, Tanjung Karang Timur, and Teluk Betung Barat. The parameters used in this study are four: road function, distance between fuel stations, distance of fuel stations to residential areas, and areas prone to landslide disasters. The level of suitability of fuel stations is classified into three categories: highly suitable, suitable, and less suitable. Out of the 33 fuel stations, 32 are classified as very suitable, and 1 is classified as suitable.
A Study on Three-Dimensional Modelling of the Baitul Ilmi Mosque's Itera Using Terrestrial Laser Scanner Technology Ryan Delfa Amanda; Irdam Adil; Misfallah Nurhayati
Jurnal Inotera Vol. 9 No. 1 (2024): January-June 2024
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol9.Iss1.2024.ID317

Abstract

As advancements in three-dimensional (3D) modeling continue to progress, the demand for precise and efficient measurement techniques has led to significant innovations in the methods and tools used for creating 3D models. Among these, the utilization of Terrestrial Laser Scanners (TLS) has become increasingly popular. This study focuses on the integration of TLS and total station technologies for 3D modeling of a mosque. The total station was employed to conduct five sets of perfectly bonded closed polygon measurements, each consisting of five polygon points, from which three marker points were derived. Concurrently, the TLS was used to perform a comprehensive scan of the mosque from 17 different positions. The data obtained from the TLS scan provided a detailed 3D model, while the total station measurements served as control points to ensure the model's global coordinate accuracy. The processing of the closed polygon data was executed using the Bowditch method, and the TLS data was registered using the cloud-to-cloud method. This approach yielded an overall quality assessment, including a bundle error of 0.008 m, an overlap of 27%, a strength of 65%, and a cloud-to-cloud discrepancy of 0.008 m. The integration of point clouds with total station coordinates resulted in an error margin of 0.160 m. Geometric validation of the model was conducted by comparing its dimensions to measurements obtained using a measuring tape, which yielded a Root Mean Square Error (RMSE) of 0.045 m.
Pemodelan Pasut di Indonesia Timur Menggunakan Data Asimilasi dari Altimetri, Stasiun Pasut, dan Model Hidrodinamika Misfallah Nurhayati; Dudy Darmawan Wijaya
Jurnal Inotera Vol. 9 No. 1 (2024): January-June 2024
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol9.Iss1.2024.ID346

Abstract

Tides play a crucial role in various coastal and marine activities. Despite numerous tidal models developed in Indonesia, modeling tides in shallow waters with complex topographies remains challenging, particularly in the Eastern Indonesian Sea. This study aims to develop a high-accuracy tidal model for Eastern Indonesian sea using data assimilation techniques integrating observational data and ocean dynamics model. The study tested various scenarios, including different numbers of tide gauge observations, representers, and decorrelation length values in dynamic equations. By assimilating data from altimetry, tide gauges, and hydrodynamic models, significant improvements in model accuracy were achieved. Results show that of the 11 validator tide stations, while the rest stations have the predicted RMS values below 16 cm, and seven stations have the predicted RMS values below 9 cm. These findings highlight the potential use of assimilation technique for accurate tidal predictions in shallow waters with complex topographies, enhancing the safety and efficiency of coastal and marine activities in Eastern Indonesia.
Refining the Indonesian Geoid Model: A Comparative Study of Global Geopotential Models in East Kalimantan Fahri Dean Alvito; Zulfikar Adlan Nadzir; Misfallah Nurhayati
Geoid Vol 20 No 2 (2025)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v20i2.3068

Abstract

Gravity field along with its derivative, geoid, is one of the important pillars of Geodesy. The geoid is utilized in many countries as the vertical reference system, Indonesia as well. However, Indonesia is unique in topography, made the computation of geoid model throughout the archipelago a challenge. The development of geoid model in Indonesia has 4 phases, with the latest in 2020 and 2023. INAGEOID2020 is the Indonesian geoid model used as vertical reference frame for vertical control in Indonesia, updated to version 2.0 in 2023. However, it has not achieved the target accuracy of 5 cm throughout the country. INAGEOID2020 v2.0 is based on the EGM2008 global geopotential model (GGM) with order and degree 360, which is now nearly 20 years old. The implementation of EGM2008 into the regional model also lacked a fitting process, relying solely on functional calculations. This study proposes using modern GGMs, namely EGM2008, XGM2019e, and SGG-UGM-2, along with a fitting process to improve geoid modeling, to optimize the future iteration of Indonesian Geoid Model. The research compares the gravimetric undulations of these models to geometric undulations at 264 validation points, both with and without fitting in East Kalimantan. The fitting improved the accuracy of EGM2008 and XGM2019e, but SGG-UGM-2 performed worse due to elevation discrepancies both before and after the fitting, mainly due to difference on the starting point close to the coast. XGM2019e at degree 2190, truncated to 720 and 360 showed the best results after the fitting, achieving standard deviation and root mean square error (RMSE) values of 0.061 m and 0.064 m, respectively. The performance of EGM2008 is not far behind XGM2019e. This finding indicates that the XGM2019e is the best out the trio, making it a promising alternative to be utilized for future geoid modeling in Indonesia.
Co-Authors Dudy Darmawan Wijaya Een Lujainatul Isnaini Fahri Dean Alvito Irdam Adil Meraty Ramadhini Muhammad Ario Eko Rahadianto Nadzir, Zulfikar Adlan Ryan Delfa Amanda Vanisa Aufa Maharani