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All Journal Explore: Jurnal Sistem Informasi dan Telematika (Telekomunikasi, Multimedia dan Informatika) Jurnal Edukasi dan Penelitian Informatika (JEPIN) Jurnas Nasional Teknologi dan Sistem Informasi Sistemasi: Jurnal Sistem Informasi JMM (Jurnal Masyarakat Mandiri) INTECOMS: Journal of Information Technology and Computer Science JMKSP (Jurnal Manajemen, Kepemimpinan, dan Supervisi Pendidikan) Ensiklopedia of Journal Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Jurnal Hilirisasi IPTEKS (JHI) Linguists: Journal of Linguistics and Language Teaching Journal of Applied Engineering and Technological Science (JAETS) Media Informatika PRODU-Prokurasi Edukasi (Jurnal Manajemen Pendidikan Islam) Jurnal FASILKOM (teknologi inFormASi dan ILmu KOMputer) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Pengabdian kepada Masyarakat JUSTIN (Jurnal Sistem dan Teknologi Informasi) Jurnal Andalas: Rekayasa dan Penerapan Teknologi Electronic Journal of Education, Social Economics and Technology Journal of Social Work and Science Education Jurnal Testing dan Implementasi Sistem Informasi LINGUISTS : JOURNAL OF LINGUISTICS AND LANGUAGE TEACHING
Rahmadoni, Jefril
Universitas Andalas
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Optimized Land Surface Low Point Detection Using the D8 Algorithm in a Geographic Information System (GIS) Framework Khairul Muttaqin; Novianda Novianda; Ahmad Ihsan; Dea Ayuni Putri; Cut Alna Fadhilla; Chichi Rizka Gunawan; Chicha Rizka Gunawan; Jefril Rahmadoni
Jurnal Testing dan Implementasi Sistem Informasi Vol. 4 No. 1 (2026): Jurnal Testing dan Implementasi Sistem Informasi
Publisher : Lembaga Riset dan Inovasi Almatani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55583/jtisi.v4i1.2205

Abstract

Hydrological analysis in urban areas often suffers from inaccuracies in Digital Elevation Model (DEM) interpretation, especially in detecting micro-depressions and small-scale surface flow patterns. Previous studies typically relied solely on the automatic D8 algorithm in GIS without manual verification, resulting in flow directions that do not fully represent actual surface conditions. This study aims to compare manual D8-based flow direction calculations with automatic ArcGIS processing using DEMNAS data for Langsa City. The DEM (8.1 m resolution) underwent sink filling, hydrological conditioning, slope and aspect processing, followed by field validation using GPS measurements. The results show that the manual method identified 23 flow paths, whereas ArcGIS detected only 11. The differences stem mainly from micro-topographic variations that the automatic algorithm failed to capture in flat areas or anthropogenically modified surfaces. Field validation confirmed that 8 of the 11 ArcGIS-derived paths matched the actual drainage patterns, while the additional manual paths better represented subtle elevation gradients.This research contributes by offering a systematic comparison between manual and automatic D8 approaches, highlighting the importance of manual verification in low-slope urban terrains. The findings are valuable for micro-scale flood mitigation planning and urban surface hydrology analysis.
Co-Authors AA Sudharmawan, AA Adi Arga Arifnur Afriyanti Dwi Kartika Ahmad Fadli Ramadhan Ahmad Ihsan Aina Hubby Aziira Akbar, Ricky Alfin Adha Anshar Alvino Albas Andina Juita Sari Anwar, Khairil Asfar, Thomas Nobel Asniati Asniati Asniati Bahari Asvio, Nova Azwalia Tanjung, Siti Nina Cantika, Annisa Hasifah Chicha Rizka Gunawan Chichi Rizka Gunawan Cut Alna Fadhilla Dea Ayuni Putri Devi Yulia Rahmi Dwi Kartika, Afriyanti Dwi Rendra Graha Putra Dwi Welly Sukma N Elvira Luthan Esi Afriyanti Fadhillawati Fri Asma Fajril Akbar Fajrul Khairati Febby Apri Wenando Febriani, Hanura Felga Zulfia Rasdiana Ghina Azzahra Guciano, Ufa Aurora Hafizah Hanim Hanifa, Ulfatmi Hanura Febriani Hanura Febriani Haris Suryamen Hasdi Putra Hasdi Putra, Hasdi Hidayat, Danny Husnil Kamil Husnil Khatimah Ismed Ismed Istikomah Istikomah Khairil Anwar Khairul Muttaqin Lova Endriani Zen Meza Silvana Mindani Mindani Muhammad Hafiz Aulia Rahmadoni Muhammad Zaim Milzam Mustamin, Abdul Aziz Bin Muthia Luthfiyah Nadilla Saraswati Nadiva, Najla Nedia Putri Ismala Nirad, Dwi Welly Sukma Novianda Novianda Nugrahesa Riqua, Rasyid Oktavia, Fitriyeni Onia, Saifaldin Idris Pramudya, Esen Putri Jugalo Rafiqatul Ulya Rahmatika Pratama Santi Raidha Qatrunnada Raveenthiran Vivekanantharasa Raveenthiran Vivekanantharasa Rika Fatmadona Risti Kurnia Dewi Saidek, Abdul Rahim Saifaldin Idris Onia Salsabila Julia Putri Salsabila Rahmah Selvi Ananda Shelvy Haria Roza Silmi Silmi Siti Nina Azwalia Tanjung Sriwahyuni, Eci Sugianto Sugianto Surya Afnarius Suryani, Indah Permata Syahda Permata Ardelia Syarifatun Nisa Tri Rahayuningsih Ufa Aurora Guciano Ufa Aurora Guciano Ulfatmi Hanifa Ulfatmi Hanifa Ullya Mega Wahyuni Vivekanantharasa, Raveenthiran Wahyudi Wahyudi Welya Refdi, Cesar Wiji Aziiz Hari Mukti Wulandari, Isnain Yafi Hisyam, Ziggy Yunida, Heni ZA, Ayulia Fardila Sari