<![CDATA[Coastal development increasingly takes place in environments where dynamic shoreline processes undermine the permanence of spatial planning and infrastructure. This research investigates long-term shoreline change along the Tanjung Pandan coast, Indonesia, and assesses its implications for coastal management, with Tanjung Pendam serving as a strategic urban waterfront. A quantitative spatial-descriptive methodology, combined with planning interpretation, was employed using multi-temporal shoreline data from 2000, 2013, and 2025. Abrasion and accretion were spatially delineated and proportionally quantified, while the Integrated City Planning framework was used to analyze coastal-management conditions and planning trajectories. Results indicate that abrasion constitutes 91.86% of the total mapped shoreline-change area, whereas accretion accounts for only 8.14%, revealing a significant imbalance in coastal transformation. At Tanjung Pendam, shoreline dynamics coincide with tidal flooding and spatially variable coastal protection, underscoring a gap between coastal mobility and relatively static planning decisions. The findings do not directly attribute observed shoreline change to sea-level rise but highlight its significance as a future adaptation factor. This research demonstrates that historical shoreline data can serve as a practical foundation for adaptive coastal spatial management by enhancing the integration of shoreline monitoring, spatial planning, and differentiated coastal-management strategies.]]>
