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All Journal Telematika : Jurnal Informatika dan Teknologi Informasi Journal of Physics and Its Applications International Journal of Computer and Information System (IJCIS) Jurnal Geosaintek
Alfiani, Oktavia Dewi
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Astronomy Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Physics

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Information System for Batik Small and Medium Enterprises (SMEs): Implementation of 3D Maps as a Means of Promotion and Ease of Access to Information Wahyuningrum, Dwi; Alfiani, Oktavia Dewi; Arfianto, Nasrul
International Journal of Computer and Information System (IJCIS) Vol 6, No 1 (2025): IJCIS : Vol 6 - Issue 1 - 2025
Publisher : Institut Teknologi Bisnis AAS Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/ijcis.v6i1.216

Abstract

Competition to improve and optimize existing systems to achieve targeted results in an industrial ecosystem is increasingly fierce. This also applies to the Micro, Small, and Medium Enterprises (MSMEs) in Yogyakarta's batik industry. From the consumer's perspective, access to location information is crucial for evaluating the conditions and products of MSMEs. On the other hand, for MSMEs, an increase in consumer visits translates to higher sales. Facilitating the availability of information is a key strategy to attract more visitors to MSMEs, both through direct visits to physical stores and virtually via online shopping platforms. One critical type of information is spatial data (space/position), which consumers use to locate MSMEs. A technological approach, such as website-based spatial access, is expected to meet this need. This study aims to enhance the accessibility of information for all stakeholders, including consumers and other participants in the batik industry ecosystem. It also enables batik MSMEs to optimize promotional strategies, increasing visitor numbers and product sales. This research applied the concept of 3-dimensional visualization to represent the locations of Batik MSMEs in Yogyakarta City and developed an information system for these businesses. The data includes spatial data and attributes, such as a list of MSMEs and detailed information. The information system was developed by integrating MSME location data with MapboxGL (a web app service) to provide a realistic 3D visualization of MSME locations. The final output is a website-based information system freely accessible online to various stakeholders, including consumers, policymakers, and institutions.
Penggunaan Action Camera Pada Spherical Photogrammetry Untuk Pemodelan Tiga Dimensi Hartadi, Joko; Ihsanudin, Taufiq; Alfiani, Oktavia Dewi; Apriyanti, Dessy
Jurnal Geosaintek Vol. 4 No. 3 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Penggunaan action camera untuk pengumpulan data dapat diterapkan untuk pengambilan data spherical photogrammetry. Data foto diambil dengan memposisikan kamera pada salah satu titik exposure. Titik ini menjadi sumbu rotasi kamera saat melakukan pengambilan foto dengan sudut pandang 360°. Overlap kamera panoramik dibuat vertikal untuk mendapatkan foto stereo fasad candi yang akan dibuat model tiga dimensinya. Pembuatan foto panorama memerlukan beberapa foto dengan membuat bagian dari foto yang saling bertampalan (overlap). Kelebihan foto ini ialah dengan sekali berdiri alat dapat meliput sudut pandang 360° dalam arah horisontal dan 180° dalam arah vertikal. Permukaan objek yang dimodelkan dapat direpresentasikan dalam bentuk mesh. Mesh (dalam komunitas komputer grafik) diperoleh dari penggabungan titik-titik yang menghubungan setiap fitur yang sama menjadi jaring segitiga atau biasa disebut sebagai triangular irregular network (TIN) dalam fotogrametri. Hasil akhir dari rekonstruksi objek adalah model 3D yang memiliki tekstur
Comparison Between Seismic Inversion and Seismic Inversion with Bayesian Inference in Acoustic Impedance Raharjo, Wiji; Palupi, Indriati Retno; Alfiani, Oktavia Dewi
Journal of Physics and Its Applications Vol 7, No 3 (2025): August 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i3.25867

Abstract

Finding reflection coefficient of seismic trace data is very important to be analyzed in some geological features. Reflection coefficient describes the medium of the subsurface based on Acoustic Impedance (AI) data. Model based seismic inversion is one way that can be used to find reflection coefficient of trace seismic. It needs several steps, like generating calculated trace seismic due to the original one before inversion. Unfortunately, the process is very complicated to reach a best result indicated by error value tends to be zero. While Bayesian MCMC offers the easier way, by setting mean and standard deviation values, it will generate calculated seismic trace data automatically with high similarity to the original one.  In other words, Bayesian MCMC helping the inversion process to be shorter. Finally, we have proven that Bayesian MCMC gives the better result of reflection coefficient of model based seismic inversion method.
MULTIPLE ATENUATION IN SHOT GATHER BY USING CONVOLUTIONAL NEURAL NETWORK (CNN) Raharjo, Wiji; Palupi, Indriati Retno; Alfiani, Oktavia Dewi
Jurnal Geosaintek Vol. 11 No. 2 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v11i2.5192

Abstract

Today Machine Learning is used in almost every field for human life, including geophysics. Some examples of Machine Learning utilities are classifying lithology and predict petro physical parameters based on several supported data. Especially in seismic method, Machine Learning can be used for removing or attenuate multiple from seismic image or shot gather data by using Convolutional Neural Network (CNN). It reduces the multiple from shot gather data (input) based on filtered shot gather data (called by ground truth model) as the label or target. Unfortunately, filtering process sometimes erase boundaries layer in shot gather. Then CNN works by generating several activation function in neurons and hidden layers, multiply with input data and reconcile them to labels to reinforce the boundaries. To validate the CNN result, it can be seen from L – curve as the loss function that represent the prediction error. The fewer the prediction error, the more accurate result is observed.
Visualization of Islamic Boarding School Location at Yogyakarta with Web-Based Geodesain Alfiani, Oktavia Dewi; Wahyuningrum, Dwi; Saifullah, Shoffan; Haekal, Haekal
Telematika Vol 20 No 3 (2023): Edisi Oktober 2023
Publisher : Jurusan Informatika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/telematika.v20i3.10885

Abstract

Purpose: This research produces a webGIS design that presents the geospatial location of buildings in the Krapyak Yogyakarta boarding school area to facilitate users outside the area when heading to the location of the boarding school whose buildings are scattered.Design/methodology/approach: By combining aerial photos from UAV mapping with Open Street Map. The combined results of both maps are presented in a webGIS built from HTML, CSS and OpenLayers scripting.Findings/result: Building a webGIS to present information on the location of Krapyak Islamic boarding schools that has been equipped with corrected coordinates and routes from the iconic city of Yogyakarta so that immigrants from outside the area can easily understand the use of the webgis. Originality/value/state of the art: From previous research, webGIS development only uses maps presented through openstreetmap where if users use existing online navigation applications have different coordinate system references (Soraya R, 2018). So by equalizing the map reference by combining the results of UAV mapping and correcting the shape of the building presented on openstreetmap, the spatial information from the webgis will have a position accuracy that is more in line with the truth.
Co-Authors APRIYANTI, DESSY Dwi Wahyuningrum Haekal, Haekal Ihsanudin, Taufiq Indriati Retno Palupi, Indriati Retno Joko Hartadi, Joko Nasrul Arfianto Saifullah, Shoffan Wiji Raharjo