Network Thinking Reshapes Heritage Conservation: How Serial Heritage Corridors Become a New Tool for Urban Strategy

When Heritage Conservation Encounters the Network Age

The traditional logic of cultural heritage conservation—centered on individual sites, demarcating boundaries, and restricting development—is gradually giving way to a more systematic, networked approach. UNESCO's concept of "serial properties" marks the international heritage community's recognition that the value of heritage often lies not in isolated points, but in the cultural connections and spatial contexts between those points. However, a gap persists between theoretical consensus and practical implementation: how to move from "listing relevant sites" to "quantifying and managing a living network"?

A study recently published in npj Heritage Science, using the Maritime Silk Road heritage sites in Zhangzhou, China as a case, offers a technical pathway. The researchers employed Spatial Design Network Analysis (sDNA) and the Minimum Cumulative Resistance (MCR) model to integrate 421 scattered heritage points into a hierarchical, gradable, and classifiable heritage corridor network. The significance of this work extends far beyond an update to the technical toolbox—it effectively provides urban and regional strategists with a new "spatial grammar" to reassess the role of heritage in contemporary urban competition.

From "Point-Based Inventories" to "Network Topology"

Traditional heritage corridor construction has often relied on qualitative judgments or simple spatial overlays, resulting in a "flat" corridor outline with vague internal structure. The breakthrough of this study lies in its use of the MCR model to simulate "least-resistance paths" between heritage points—comprehensively considering factors such as terrain, transportation, and land use—to generate a hierarchical corridor system of main routes and branches. Subsequently, sDNA was used to divide the corridor network into 80 segments, classified into 5 levels based on indicators such as connectivity and betweenness, and further identifying 5 major functional types and 16 subtypes.

What does this mean? In short, the heritage corridor is no longer just a "cultural route" but a spatial system with internal differentiation. Some segments serve as the "central nervous system" of the network, bearing high-density flows of information and energy; others are "peripheral capillaries," remote yet likely carrying unique local memories. This refined understanding allows conservation resources to be allocated according to priority and enables urban decision-makers to precisely identify which nodes are key to enhancing regional connectivity.

Heritage Corridors: New Infrastructure for Urban Competition

Placing this technical achievement in the context of global urban competition highlights its strategic value. In the accelerated urbanization of cities in the Global South, historical heritage often faces two fates: either erased by bulldozers to make way for highways or commercial complexes, or isolated as "preserved" tourist attractions detached from surrounding communities. The heritage corridor paradigm offers a third path: embedding the heritage network into the urban fabric, making it a spatial infrastructure that connects urban sub-regions, activates peripheral areas, and shapes cultural identity.Taking Zhangzhou as an example, the heritage sites of the Maritime Silk Road are scattered along the coast, at river mouths, and among inland hills. Through the construction of a corridor network, these scattered historical traces are integrated into a coherent spatial narrative, which not only strengthens the integrity of cultural history but also provides a framework for tourism route planning, ecological greenway connections, and rural revitalization. Similar methods have been preliminarily applied to linear heritage sites such as China's Ancient Tea Horse Road and the Grand Canal, and the introduction of sDNA has made this integration more precise.

From a broader perspective, the networking of heritage corridors is becoming an invisible asset for cities along the Belt and Road Initiative to participate in global cultural competition. While hard infrastructure such as railways and ports constitutes the backbone of geo-economics, cultural corridors endow these physical connections with meaning and warmth. Cities or regions that can take the lead in establishing a quantitative and operational heritage network management framework will gain an advantage in global cultural discourse and tourism appeal.

Structural Resilience: Urban Strategic Insights from Heritage Networks

This study also reveals a often overlooked point: the structural resilience of heritage networks. By classifying the network into different levels, researchers found that if some high-level segments (such as main roads) are damaged, it may cause the entire network to break; while some low-level branches, though fragile, have high redundancy and can provide alternative paths. This "resilience thinking" directly corresponds to the principles of redundancy and core protection in urban infrastructure planning.

For large cities in the Global South that are rapidly expanding, this logic is highly enlightening. Many cities' historic districts are under development pressure, and conservation plans are often shelved due to "high costs" or "hindering development". But if it can be demonstrated that the historical heritage network itself is a "spatial infrastructure" with connectivity, accessibility, and service capacity, then conservation is no longer a burden on development, but part of the resilience of the urban system.

A New Paradigm for Heritage Governance in the Digital Age

From a methodological perspective, the combination of sDNA and the MCR model represents the penetration of "computational social science" into heritage governance. It shifts heritage conservation from static "inventory management" to dynamic "network management"—managers can simulate the impact of a certain intervention (such as building a new road or adding a scenic spot) on the overall network connectivity, thus making evidence-based decisions. This capability is particularly important for cities in developing countries with limited resources.

Of course, this technical approach also has its limitations: the model relies on high-quality spatial data and reasonable assignment of resistance factors, which can become a bottleneck in data-scarce regions. Moreover, the value of heritage cannot be fully spatialized—intangible spiritual connotations, community sentiments, etc., are difficult to quantify. But as an auxiliary tool for "holistic understanding", it is already powerful enough.

Conclusion: Heritage Corridors and the Future of Urban CivilizationAs the global urban system undergoes a new round of restructuring—characterized by climate resilience, digital transformation, and geocultural competition—heritage conservation is no longer the exclusive domain of archaeologists or planners. It is becoming a core component of urban strategy. The case of Zhangzhou shows that, with advanced network analysis methods, we can weave scattered cultural fragments into a structured, layered, and vibrant network. This network is both a reflection of history and a blueprint for the future.

For any city seeking a unique position within the global urban network, the answer may lie hidden among neglected sites, ancient roads, and wharves. The key is to systematically uncover the "hidden connections" between them—and network science is providing the tools to unlock this key.