This study assesses ecological conditions in West Bandung using the Remote Sensing Ecological Index Considering Full Elements (RSEIFE), which integrates NDVI, NDBSI, WET, and LST through entropy-based weighting. Landsat 9 imagery and elevation data were used to evaluate ecological quality across four elevation zones. Results show a strong positive correlation between NDVI and WET (r = 0.728) and a negative correlation between NDVI and LST (r = –0.628), indicating vegetation's role in cooling and moisture retention. The highest mean RSEIFE value (0.424) was found in areas above 1500 masl, while the lowest minimum value (0.0677) occurred below 1000 masl. Spatial analysis reveals that highland districts (e.g., Gunung Halu, Rongga) maintain better ecological integrity, while lowland urban zones (e.g., Padalarang, Batujajar) face ecological stress. These findings highlight how topographic variation influences ecological conditions, emphasizing its importance in guiding sustainable land-use planning. Keywords: Ecological Index, Environment, Urbanisation
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