Search Results (57)

This study examines the political and elite motives behind Colombo’s ‘world-class city’ initiative and its impact on public housing in underserved communities. Informed by interviews with high-ranking government officials, including urban planning experts and military officers, this study examines how President Rajapaksa’s elite-driven postwar Sri Lankan government leveraged military capacities within the neoliberal developmental framework to transform Colombo’s urban space for political and economic goals, often at the expense of marginalized communities. Applying a contextual discourse analysis model, which views discourse as a constellation of arguments within a specific context, we critically analyzed interview discussions to clarify the rationale behind the militarized approach to public housing while highlighting its contradictions, including the displacement of underserved communities and the ethical concerns associated with compulsory relocation. The findings suggest that Colombo’s postwar public housing program was utilized to consolidate authoritarian control and promote speculative urban transformation, treating public housing as a secondary aspect of broader political and economic agendas. Anchored in militarized urban governance, these elite-driven strategies failed to achieve their anticipated economic objectives and deepened socio-spatial inequalities, raising serious concerns about exclusionary and undemocratic planning practices. The paper recommends that future urban planning strike a balance between economic objectives and principles of spatial justice, inclusion, and participatory governance, promoting democratic and socially equitable urban development. Full article

This paper explores ways to improve the coordinate transformation of maps from the First and Second Military Surveys of the Austro-Hungarian Monarchy using airborne laser scanning (ALS) data. The paper analyses the current positional accuracy of georeferenced maps from the first two military mappings from available spatial data sources. Several areas of interest with different terrain ruggedness (plain, undulated terrain, mountains) were selected for analysis to investigate whether terrain ruggedness has an impact on the accuracy of these maps. The next part of the paper deals with the georeferencing of military mapping maps using current, mid-20th-century maps and ALS data using affine and second-degree polynomial transformations. The paper concludes with a statistical analysis and evaluation of the potential of ALS data for solving this type of problem. The results obtained in the paper indicate that ALS data can be a suitable source for finding control points to transform early topographic maps. Full article

Guomari fortress in eastern Qinghai Province exemplifies vernacular architecture shaped by multiethnic interaction, environmental adaptation, and localized defense strategies. Originally a Ming Dynasty military-agricultural outpost, it evolved into a Tu ethnic settlement. Fieldwork, including architectural surveys and spatial analysis, identified a three-tiered defensive system: (1) strategic use of terrain and rammed-earth walls; (2) labyrinthine alleys with L-, T-, and cross-shaped intersections; and (3) interconnected rooftops forming elevated circulation routes. Courtyards are categorized into single-line, L-shaped, U-shaped, and fully enclosed layouts, reflecting adaptations to terrain, ritual functions, and thermal needs. Architectural features such as thick loam-coated walls and flat roofs demonstrate climatic adaptation, while the integration of Han timber frameworks, Tibetan prayer halls, and Tu decorative elements reveals cultural convergence. Traditional craftsmanship, including carved wooden scripture blocks and tsampa-based murals, is embedded within domestic and ritual spaces. The fortress’s circulation patterns mirror Tibetan Buddhist cosmology, with mandala-like alleys and rooftop circumambulation routes. These findings offer insights into vernacular resilience and inform conservation strategies for multiethnic fortified settlements. Full article

The Great Wall of China, one of the nation’s most remarkable military defense structures, possesses a history spanning several millennia and is associated with numerous heritage sites. Today, it stands as a world-renowned cultural heritage asset. Vegetation growing on the ruins of the Great Wall can exert both detrimental and protective effects on the structure. Indiscriminate removal of such vegetation may lead to unintended damage to the heritage site. Drawing on the theory of “evaluative conservation”, this study integrates the analytic hierarchy process (AHP) and the Delphi method to develop a resistance assessment system for vegetation removal. A case study was conducted on 40 plant species or categories located along the Ming-era Guangwu section of the Great Wall, with spatial zoning analysis applied to inform removal strategies. The results reveal the structure, key factors, and classification criteria of the resistance evaluation system. Corresponding management recommendations are proposed, including strategies such as “preservation”, “partial preservation”, “removal”, and “subsequent removal and management”. This research provides a foundational reference for the conservation and restoration of the Great Wall heritage, and for the management of associated vegetation. Full article

Recent advancements in aviation and automation technologies have catalyzed the emergence of Urban Air Mobility (UAM), an innovative transportation paradigm involving the use of automated vertical take-off and landing aircraft for intra-city passenger travel. Despite growing global interest, the development and application of integrated geospatial frameworks for UAM infrastructure planning—particularly vertiport siting—remain limited. Thus, this study proposes a three-stage geospatial analysis framework, which consists of (1) Suitability analysis, employing multi-criteria decision-making techniques; (2) Regulation analysis, which screens out parcels restricted by aviation safety standards, land-use policies, and other statutory constraints; and (3) Location-allocation analysis, which spatially optimizes vertiport distribution in accordance with urban master plans and strategic transport priorities. Then, this framework is empirically applied to two South Korean UAM pilot sites—Busan and Jeju. The findings reveal that high-suitability areas are predominantly concentrated in dense urban cores with strong multimodal connectivity and mixed land-use configurations. However, a significant proportion of these zones are rendered infeasible due to regulatory exclusions, such as military flight paths and restricted airspace. Additionally, areas with lower suitability—often home to marginalized populations—raise critical equity concerns. This study contributes to the advancement of urban geospatial analytics by presenting a replicable methodological framework for vertiport site selection, while offering strategic insights to inform early-stage UAM deployment initiatives. Full article

Lip-reading, a crucial technique to recognize human lip movement patterns for semantic output, has gained increasing attention due to its broad applications in public safety, healthcare, the military, and entertainment. Spatiotemporal feature enhancement techniques have played a significant role in advancing lip-reading research in deep learning. This paper presents a comprehensive review of the latest advancements in methods for lip-reading by exploring key properties of diversity enhancement techniques, involving spatial features, spatiotemporal convolution, attention mechanisms, pulse features, audio-visual features, and so on. Furthermore, according to different network structures, the six spatiotemporal feature enhancement method for lip-reading is offered. And each spatiotemporal feature enhancement method was divided into different subclasses based on the differences in the architecture structure, feature attributes, and application types. Ultimately, this is followed by an in-depth discussion of state-of-the-art spatiotemporal feature enhancement methods, accompanied by an analysis of the challenges and limitations faced, and a discussion of future research directions. From different views, this comprehensive review reveals the limitations and intrinsic disparities among these techniques in different categories for scholars to embark on innovative paths in the advancement of lip-reading. Full article

This study examines Xi’an’s spatial evolution using Historical GIS (HGIS) methodologies, integrating Space Syntax and Kernel Density Estimation (KDE). Analyzing six historical periods—from the Five Dynasties to the early PRC—it highlights Xi’an’s transformation from a centralized structure reinforcing political hierarchies to a decentralized, polycentric city shaped by economic diversification and industrialization. Centralized layouts in the early periods supported governance and military control, while the Ming and Qing periods saw decentralization driven by trade and cultural exchange via the Silk Road. The PRC era introduced industrial expansion, creating specialized zones but reducing the integration of the historical core. This study bridges historical narratives with quantitative spatial analysis, revealing often-overlooked socio-spatial dynamics. It offers lessons for urban planning, emphasizing polycentric development, adaptive reuse of historical spaces, and equitable growth. Balancing modernization with heritage preservation is a key theme, providing a sustainable model for historic cities. By integrating historical and spatial analysis, this research provides strategies to balance cultural heritage with urban development. This ensures that Xi’an remains a dynamic city that blends history and modernity. Full article

As an exemplary and quintessential representation of China’s late-stage religious stone-carving art, previous research on the Dazu Rock Carvings has primarily concentrated on the typical cave remains in core areas like Baoding and Beishan. These investigations have been highly adept at archeological typology and iconographic analysis. This study, based on 134 extant inscriptions, reassesses the Beishan and Nanshan stone-carving complexes from the perspective of cultural heritage integrity. Through long-term landscape analysis, we uncovered their distinctive value in the construction of religious spaces during the Northern and Southern Song Dynasties. During the Song Dynasty (Zhao Song Dynasty), Buddhism held sway in Beishan, while Nanshan developed a comprehensive Taoist pantheon system encompassing the Three Pure Ones (Sanqing) and the Six Imperial Divinities (Liuyu). Together, they formed a religious spatial pattern of “Sakyamuni in Beishan and Taoist deities in Nanshan”. Furthermore, since the Shaoxing era (1131–1162), inscriptions left by Confucian scholars and officials during their visits to these two mountains have been frequently encountered. This spatial overlap phenomenon mirrors the profound integration of religious practices and secular power in the Bashu region during the Song Dynasty. This research breaks through the traditional case-study paradigm. By systematically examining the spatio-temporal evolution of the stone-carving complexes and the network of inscriptions, it reveals that the religious landscape of Dazu is, in essence, the outcome of the cumulative layering of political power, economic resources, and cultural aspirations across diverse historical periods. In particular, the transformation of Beishan and Nanshan from the merit caves of military generals in the late Tang Dynasty to the cultural spaces of the gentry class in the Song Dynasty vividly demonstrates the local practice model in the secularization process of Chinese religious art from the 10th to the 13th century. Full article

As urbanization accelerates globally, preserving and developing historical cultural districts is increasingly critical, especially in areas with unique historical and cultural value. To understand the development of urban construction and the diachronic and spatial patterns of development, this paper focuses on Guiyang, a key transportation hub in Southwest China connected to Southeast Asia. It examines the historical districts from four representative periods: the early Ming Dynasty (1413–1420), the early Qing Dynasty (1616–1626), the Republican era (1912–1949), and the 1980s (1980–1990). Employing complex network analysis, the study investigates the changes in the connectivity characteristics of construction land and road networks. Key findings reveal: (1) Stability: The construction land networks stability decreased steadily from the early Ming period to the 1980s, whereas the road network density exhibited a wave-like decline. (2) Centrality: The construction land networks centrality decreased linearly, and the road network density exhibited a wave-like decrease. (3) Vulnerability: Both networks showed increased vulnerability, with fluctuations in the road network during the early Qing period, but generally reduced vulnerability. The analysis also indicates that changes in the connectivity of Guiyang’s historical district construction land and road networks are influenced by shifts in social structures, improvements in productivity, and the physical geography of the area. In mountainous cities with limited terrain, urban forms have transitioned from single-center aggregation to multi-center aggregation, and areas where administrative expansion is not feasible have adopted compact spatial development strategies. The application of complex network analysis has proven effective in urban spatial studies, revealing that changes in construction land and road networks reflect multifaceted internal transformations in society, politics, economy, military, and culture, significantly impacting the formation of a diverse yet unified national identity. Based on these findings, this paper offers recommendations for the planning and development of mountainous cities globally. Full article

Climate change, accompanied by anomalously high temperatures and a decrease in precipitation during the warm season, can have serious consequences for the ecosystems and sustainability of the Ukrainian Polissia. In particular, there are increased risks of forest and peat fires, as well as an overall deterioration of the region’s ecological condition. Between 1990 and 2021, the Ukrainian Polissia region recorded an average temperature increase of 0.60 °C per decade, along with a 3–5% decrease in annual precipitation. An analysis of the spatial distribution of wildfire incident density based on satellite data (FIRMS) in the regions of the Ukrainian Polissia from 2001 to 2023 highlighted several periods of sharp increases in fires: 2002, 2007–2009, 2014–2015, and 2019–2020. The Spring Fire Season and the Late Summer–Autumn Fire Season coincide with periods of reduced precipitation, which in some years reached 40–60% below the climatic norm. Although the climatic conditions of spring 2022 were not as warm and dry as those in 2020, significant parts of Kyiv Polissia and Chernihiv Polissia suffered from large-scale wildfires due to ongoing military actions. The spatial distribution of fire frequency in 2020 and 2022 highlights different contributing factors: in 2020, weather anomalies were the primary cause, while in 2022, armed hostilities played a key role. Military conflicts not only increase the risk of fires but also complicate firefighting efforts, making the region even more vulnerable to large-scale forest fires, and thereby threatening its sustainability. These findings underscore the urgent need for integrated fire management strategies that take into account climate change, land-use policies, and geopolitical factors to mitigate the escalating wildfire threat in the region and ensure long-term sustainability. Full article

Traditional villages are irreplaceable cultural heritage sites, and studying their architectural spatial networks is key to preserving both the villages and their culture. This research focuses on four Bouyei villages in Central Guizhou, using social network analysis, spatial gene theory, and diversity analysis to explore their architectural spatial network characteristics. Findings include the following: (1) Zhenshan Village has the best network condition, while that or the others is average; (2) all the villages show low vulnerability Cp-1 genes; (3) Bouyei architectural networks are stable and continuous; and (4) the network is influenced by military culture, feng shui, agricultural culture, Buyi ethnic spiritual beliefs (Mo Belief Culture), topographical conditions, and modern planning interventions. The study aims to deepen the understanding of the cultural values and spatial layout characteristics of traditional villages, while preserving the cultural heritage of traditional settlements and ethnic minorities. Full article

This study examines the effectiveness of various spatial data sources and pathfinding algorithms for route determination in forested environments, focusing on the Mazovia region of Poland. Accurate and efficient forest route planning is critical for both military operations and crisis management, highlighting the need for reliable data and robust algorithms. The analysis centers on three primary spatial data sources that can support forest routing: the civilian Topographic Objects Database (TOD) and OpenStreetMap (OSM), along with the military-specific Vector Map Level 2 (VML2). Two commonly used pathfinding algorithms, Dijkstra and A* (the latter with six heuristic variations), were tested to assess their suitability and performance in these contexts. This study was conducted across ten of the largest forested areas in Mazovia, with route determinations performed between selected pairs of start and end points within each forest area. The findings indicate that the TOD database yielded the most stable and consistent routes, while the A* algorithm with Euclidean distance heuristics proved to be the fastest among the tested variants. In contrast, OSM data presented challenges due to inconsistencies, resulting in some routes being undeterminable, where connections between start and end points were lacking. These results underscore the importance of data quality and algorithm selection in effective forest route planning. Full article

Inlets through coastal barriers in functionally non-tidal settings have been relatively understudied. Yet, they have morphosedimentary elements and morphodynamic behaviors that are similar to their tidal counterparts, especially microtidal (often wave-dominated) inlets. Increasingly, remote sensing technologies (aerial and satellite imagery, small unmanned aerial vehicles, etc.) are employed as sources of high-definition spatial databases. Such approaches are important in areas with limited access, especially in regions of military conflict, such as along parts of the northern Black Sea coast, Ukraine. For rapid spatial analysis of remotely sensed or archival datasets, image color intensity (ICI) patterns are obtained using grayscale (GS) spectra and a wide range of filter options. Areal and profile-style GS patterns based on relative ICI values are extracted from available imagery, so that in a full 256-value GS spectrum the deepest parts of a channel (inlet throat) will have the lowest (darkest) values (GS < 50). Landward (flood-tidal/bayside) and seaward (ebb-tidal/seaside) deltas will exhibit lighter colors (GS > 100). Exposed siliciclastic/carbonate sand-dominated barriers and shoals will yield the lightest values (GS > 200), with dark vegetation requiring GS inversion. Hypsometric information, as well as key metrics (perimeter and area) can be easily computed using instant tracing tools, without the need for labor-intensive contour outlining. This study is the first example of assessing cross-shore and longitudinal channel morphology of microtidal (USA) and non-tidal (Ukraine) inlets. The approach is also extended to a temporal analysis of inlet closure and a recent re-activation by an intense storm. Full article

Throughout the world, river basins are directly or indirectly affected by human activities, reducing local and global biodiversity and preventing the ecosystem from properly functioning. Our research focused on the Irpin River basin (Ukraine), whose water bodies have experienced various impacts due to human activities, including the unexpected extremes caused by military operations in the catchment area: long-term flooding, disturbance of free flow, significant water level fluctuations, etc. The study hypothesized that the primary factors determining the structural and spatial distribution of quantitative indicators of microalgae and aquatic macrophytes are the result of various hydromorphological changes, that lead to changes in the physical and chemical parameters of the aquatic environment. Very high values of chlorophyll a in the water column (59–106 µg · L⁻¹), an increase in the abundance (number of cells) and biomass of algae (due to the predominance of certain groups in the transformed sections), as well as saprobic index were recorded in the sections of the Irpin River basin that underwent significant hydromorphological changes. Our results revealed a strong correlation between phytoplanktonic (in the water column) chlorophyll a levels and water temperature (r = 0.76, p < 0.001), as well as organic phosphorus and polyphosphate concentrations (r = 0.61, p < 0.01). ANOVA and Monte Carlo permutation tests in a Canonical Correspondence Analysis (CCA) showed that the abundance of different divisions of phytoplankton and phytobenthos were significantly and similarly related to several environmental variables. We observed a positive correlation between the number of cyanobacteria and the concentration of ammonium nitrogen, nitrites, and phosphorus compounds. An increase in dissolved organic matter in the water can explain the increase in the biomass of Dinoflagellata and Euglenophyta. Species richness and the cover values of the macrophytes also clearly reflected changes in vegetation activity in sections of the Irpin River caused by hydromorphological changes. The results indicated that long-term flooding had the most negative impact on macrophyte communities. At some sites, the impact was so severe that the number of macrophyte species was very low. The total number of macrophyte species showed a significant negative correlation with total suspended solids (r = −0.51, p < 0.05) and phytoplankton chlorophyll a concentration (r = −0.73, p < 0.001). Our results provide a scientific basis for predicting changes in riverine microalgal and aquatic macrophyte communities due to extreme hydrological events. Full article

Unlike residential settlements, Chinese traditional defensive settlements (CTDS) are fortress-shaped settlements built by forefathers to resist invasion and defend their homeland. What remains of these settlements today are not only unique defensive entities but also defensive spatial layouts and architectural techniques that reflect military defense strategies and spatial patterns of ancient Chinese society, resulting in a distinct cultural heritage. Using CiteSpace as a research tool and CNKI as a core database, this paper conducts a visual analysis and review of the research related to CTDS, aiming to accurately and intuitively elaborate on the literature distribution characteristics, collaborative characteristics, key issues, research trends, and research hotspots. We found that research on CTDS focuses on three key issues: the composition system and defense mode of northern defensive settlements, the architectural style and cultural characteristics of southern defensive dwellings, and the settlements’ heritage conservation and development planning; and research trends can be divided into three phases. We also propose five future research recommendations. This study helps to fill the gap in the bibliometric review of Chinese traditional defensive settlements, serves as a reference for future priority research directions, and provides a manual for heritage conservation and sustainable development of this special type of settlement. Full article