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Journal : Asian Journal of Environmental Research

Spatial Transformation of Physical Change of Built-up Land in Ambon City Center, Indonesia, Period 1940-2025 Rifai, Ahmat; Rakuasa, Heinrich; Halim; Latue , Philia Christi; Sarfan , Riri; Tehupelasury, Syifa
Asian Journal of Environmental Research Vol. 2 No. 1 (2025): January-April
Publisher : CV. Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ajer.v2i1.319

Abstract

The background of this research focuses on the physical transformation of built-up land in the center of Ambon City from 1940 to 2025, influenced by historical, social, and economic factors, including the impact of riots and population growth. The tools and materials used in this research include thematic maps of land use from various periods, satellite images (Ikonos-2 and Planet Scope), and ArcGIS Pro software for spatial data processing. The method applied is an urban morphology approach with qualitative deductive analysis, which includes geospatial data processing to understand the pattern of urban development. The results of the discussion show that built-up land has increased significantly, although environmental challenges remain a major concern, such as the conversion of green land that impacts the carrying capacity of the environment. The conclusion of this study emphasizes the need for sustainable urban planning strategies to balance urban growth with ecosystem preservation in the future.
Spatial Analysis of Benthic and Geomorphic Habitat Distribution in the Shallow Waters of Pombo Island, Indonesia, using High Resolution PlanetScope Satellite Imagery Rifai , Ahmat; Halim; Rahayaan , Muhamad F. M.; Rakuasa, Heinrich; Rajani , La Mbeli
Asian Journal of Environmental Research Vol. 2 No. 2 (2025): May-August
Publisher : CV. Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ajer.v2i2.392

Abstract

The benthic biodiversity-rich but degradation-prone coastal waters of Pombo Island, Maluku, were mapped using high-resolution PlanetScope (3m) satellite imagery and field data through a random forest approach. The results showed the dominance of inner reef flat (54%) and sand substrate (39.62%), with 22.31% coral cover, while geomorphological analysis revealed a strong correlation between sheltered reef slope (18.78%) and benthic habitat distribution (85% classification accuracy). These findings not only prove the effectiveness of remote sensing technology for tropical ecosystem monitoring but also recommend zoning-based conservation strategies, particularly reef crest protection and seagrass rehabilitation, as a contribution to sustainable environmental management in line with SDG targets.