Forum Geografi
Vol. 38 No. 2 (2024): August 2024

Grouping Land Cover Using Orthophoto in Small Islands: An Application of Low-Cost UAV on Mansinam Island

Francine Hematang (Faculty of Forestry, Papua University, Manokwari 9831. Geo Feature Papua, Manokwari 98312.)
Agustinus Murdjoko (Faculty of Forestry, Papua University, Manokwari 9831. Center of Biodiversity research, Papua Universiti, Manokwari 98312.)
Francina Kesaulija (Faculty of Forestry, Papua University, Manokwari 9831)
Jonni Marwa (Faculty of Forestry, Papua University, Manokwari 9831.)
Antoni Ungirwalu (Faculty of Forestry, Papua University, Manokwari 9831)



Article Info

Publish Date
23 Jul 2024

Abstract

Land cover is crucial for island management, but the lack of accessible and high-resolution remote sensing data has reduced investigations on small islands, including land cover identification. Therefore, this study aimed to investigate land cover using Unmanned Aerial Vehicle (UAV) technology, providing very high-resolution images. Classification and delineation were conducted using automatic segmentation followed by manual reinterpretation and visual verification. The results showed 14 cover classes, consisting of 8 vegetated and six non-vegetated categories. Forest cover on Mansinam island accounted for 75.5% or 302.4 ha, which was evenly distributed. Furthermore, primary forest covered 31.91% or 127.74 ha, and secondary covered 43.63% or 174.68 ha. The classification achieved an overall accuracy of 96% and a kappa coefficient of 0.94. Low-cost UAVs effectively produced high-resolution aerial images of small islands for land cover identification. Therefore, future studies were recommended to consider whether segmentation can reliably distinguish between primary and secondary forests, as well as assess the impact of flight altitude on segmentation accuracy using ground control points. The results were also expected to support spatial planning or sustainable forest and environment management on Mansinam Island.

Copyrights © 2024






Journal Info

Abbrev

fg

Publisher

Subject

Earth & Planetary Sciences

Description

Aim Forum Geografi is an open-access, peer-reviewed journal dedicated to advancing the field of geography by publishing original scientific articles on spatial issues. The journal prioritizes studies that employ rigorous spatial analysis and geospatial technologies—such as GIS and remote ...