Spatial Reconstruction and Economic Vitality Assessment of Historical Towns Using SDGSAT-1 Nighttime Light Imagery and Historical GIS: A Case Study of Suburban Shanghai
Historical towns embody the origins and continuity of urban civilization, preserving distinctive spatial fabrics, cultural lineages, and latent economic value within contemporary metropolitan systems. Their integrated conservation directly aligns with SDG 11.4, and advances the holistic preservation...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/17/13/2123 |
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| Summary: | Historical towns embody the origins and continuity of urban civilization, preserving distinctive spatial fabrics, cultural lineages, and latent economic value within contemporary metropolitan systems. Their integrated conservation directly aligns with SDG 11.4, and advances the holistic preservation objectives of historic urban landscapes (HULs). However, achieving these objectives cannot be solely dependent on modern remote sensing technologies; it necessitates the integration of historical geographic information system (HGIS) theoretical frameworks and methodological approaches. Leveraging HGIS and multisource data—including SDGSAT-1 nighttime light imagery, textual documents, and historical maps—this study reconstructed the spatial extent of historical towns in suburban Shanghai and assessed their present-day economic vitality through light-based spatial proxies. Key results comprised the following. (1) Most suburban historical towns are small, yet nighttime light intensity varies markedly. Jiading County, Songjiang Prefecture, and Jinshan Wei rank highest in both spatial extent and brightness. (2) Town area exhibits a strong positive relationship (R<sup>2</sup> > 0.80) with the total nighttime light index, indicating that larger settlements generally sustain higher economic activity. (3) Clusters of “low area–low light” towns showed pronounced intra-regional disparities in economic vitality, underscoring the need for targeted revitalization. (4) Natural setting, historical legacy, policy interventions, and transport accessibility jointly shape development trajectories, with policy emerging as the dominant driver. This work demonstrates a transferable framework for multidimensional assessment of historical towns, supports differentiated conservation strategies, and aids the synergistic integration of heritage preservation with regional sustainable development. |
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| ISSN: | 2072-4292 |