Jia Li's research while affiliated with Yunnan Normal University and other places
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Publications (34)
This study aims to explore the effects of different non-landslide sampling strategies on machine learning models in landslide susceptibility mapping. Non-landslide samples are inherently uncertain, and the selection of non-landslide samples may suffer from issues such as noisy or insufficient regional representations, which can affect the accuracy...
The landslide morphology is quickly and accurately extracted from Unmanned Air Vehicle (UAV) images. It is of great significance for emergency rescue and quantitative evaluation of landslide disasters. However, due to the complexity of landslide morphology, choosing the reasonable extraction thresholds is a challenging issue. A threshold selection...
The number of input factors affects the prediction accuracy of a model. Factor screening plays an important role as the starting point for data input. The aim of this study is to explore the influence of different factor screening methods on the prediction results. Taking the 2014 landslide inventory of Jingdong County as an example, a landslide da...
Landslide traces are crucial geomorphological features of landslides. Through the recognition of landslide traces, a better grasp of the topographical features of landslides can be achieved, thereby aiding in the enhancement of capabilities for the prevention, response, and management of landslides. Aiming at the complex topographic features of lan...
Due to the complex ecological effects of the interactions between natural environmental evolution and anthropogenic interference, a series of longstanding environmental problems have severely exacerbated the vulnerability of watershed ecosystems. Landscape ecological risk (LER) assessment is suitable for exploring the extent of threats and the like...
Time-series InSAR technology has been widely applied to the identification of various types of surface deformation information, but its traditional processing chain of being applied to the detection, extraction and monitoring of wide-area geohazards requires a large amount of disk space, computing resources and processing time and has high requirem...
The electromagnetic radiation (EMR) data collected along a road have a largely empty region overall, while they have a linear distribution locally. Moreover, the traditional spatial interpolation method is not suitable for the electromagnetic radiation space field (EMR-SF) construction collected along the road. In this paper, a layered radial basis...
Side-slope deformation monitoring compares monitoring data from the same area over different periods and measures the deformation variables. Because of the gaps and coarseness of side-slope monitoring data, a side-slope monitoring method that integrates terrestrial laser scanning (TLS) and unmanned aerial vehicle (UAV)–based photogrammetry point cl...
The time series interferometric synthetic aperture radar (TS-InSAR) technique has the ability to monitor the continuous slow deformation of the ground surface. Thus, it can be applied to the identification of creep bodies. However, the TS-InSAR technique has strict requirements regarding the quality of the interferograms and the interferometric bas...
Coastline is the connection line between the land and the sea, and its extraction and analysis are of great significance to the coastal zone resources and environmental protection. Using remote sensing and Geographic Information Sysytem (GIS), coastline change from 1995 to 2015 in the Fujian Province, China, was extracted. The temporal and spatial...
This study combines the Defense Meteorological Satellite Program's Operational Linescan System (DMSP/OLS) nighttime light data with the Suomi National Polar-Orbiting Partnership satellite visible infrared imaging radiometer suite (NPP/VIIRS) nighttime light data, to research 21 urban agglomerations in China from 1995 to 2015. The expansion is descr...
COVID-19 poses a major threat to global health care systems, and the recent surge in mortality rates confirms the importance of timely access to care. The capacity of medical service providers is reflected both in the spatial accessibility of medical institutions and in the spatial scope of their services. Therefore, this study aims to investigate...
The use of high-spatial-resolution remote sensing image technology on mobile and embedded equipment is an important and effective way for emergency rescue and evaluation decision-makers to quickly and accurately detect landslide areas. Deep learning-based landslide detection models include one-stage and two-stage models. The two-stage landslide det...
Landslide susceptibility assessment is used to predict the occurrence probability of landslides, and the results can provide a scientific basis for preventing and reducing landslides. Traditional assessment models usually assume that the contribution degree of landslide influence factors is fixed throughout an entire study area. Therefore, the resu...
Accurate extraction of urban built-up areas is an essential prerequisite of urbanization research. This paper proposes a local optimal threshold method based on NPP-VIIRS nighttime light images to extract urban built-up areas in mainland China. First, according to the regional economic differences, the image is divided into eight regions. Second, t...
Yunnan border area is an important geographic location. It is composed of 56 counties in 8 municipalities. Among which, 25 counties are adjacent to Laos, Myanmar, and Vietnam. Land use and nighttime light data were used in this study to explore the spatial pattern of GDP based on the spatialization of GDP in the Yunnan border area. This study was e...
Nighttime light data have been proven to perform well for economic measurements and built-up area extractions. However, the new generation of monthly NPP/VIIRS data series products, which collected from the Visible Infrared Imaging Radiometer Suite (VIIRS) sensor on the Suomi National Polar-orbiting Partnership (NPP) Satellite contains background v...
Located northeast of Yuxi City, Yunnan Province, China, the Fuxian Lake Basin is not only a famous scenic area, but also an ecological and environmental protection zone. The basin is a plateau mountainous lake region that has key ecosystem vulnerability and sensitivity. A dynamic evaluation of ecological vulnerability is important for assessing the...
Oblique imagery obtained from an Unmanned Aerial Vehicle (UAV) has been widely applied to large-scale three-dimensional (3D) reconstruction; however, the problems of partially missing model details caused by such factors as occlusion, distortion, and airflow, are still not well resolved. In this paper, a loop-shooting-aided technology is used to so...
To solve the problems of incomplete 2D display soil erosion, difficult visual expression, poor detail simulation of eroding slope, complex modeling technology, and high cost, a three-dimensional model reconstruction method for slope erosion based on sequence images is proposed. The method mainly uses motion recovery structure (SFM) and multi-view s...
Change in urban construction land use is an important factor when studying urban expansion. Many scholars have combined cellular automata (CA) with data mining algorithms to perform relevant simulation studies. However, the parameters for rule extraction are difficult to determine and the rules are simplex, and together, these factors tend to intro...
In this paper, the decision tree classification based on the CART algorithm (Classification and Regression Tree) is used to extract the impervious surface area of Nantong city in Jiangsu Province in China. Impervious surface dynamic change nearly 25 years in Nantong city is researched using four periods Landsat images of 1990, 2003, 2008, and 2014....
There are less researches in the influence of disturbance of endogenous phosphorus release in sediment. The correlational analysis only takes the disturbance as one of the many factors in influencing the phosphorus release. It hasn’t been able to make a deeper discussion from disturbance itself. In this paper, HAOHE River of Nantong, China is selec...
To improve the Features from Accelerated Segment Test (FAST) algorithm such as artificial threshold setting and the choice and ordering of continuous points on circle, a novel compass detection algorithm is proposed. The algorithm uses four compasses as the test mask and calculates threshold value based on image intensity feature. Four compasses ar...
Jiangsu province is a typical area of the urban extension problems. Urban construction land has been the major area of city research. And more and more people pay attention to this matter. In this paper, regional differences of urban construction land in Jiangsu province, China were analyzed. Firstly, this work is based on remote sensing images as...
The land surface temperature is inversed by Landsat remote sensing images of 2000, 2009 and
2015 years in Taiyuan, China. The mono-window algorithm is used to remove the influence of the atmosphere. The land surface thermal radiation intensity is obtained by the mono-window algorithm. Then the land surface true temperature is converted by the land...
In the Kriging interpolation method, different theory models of variation function are selected and fitted. There are many common variation function models, such as spherical model, index model, Gaussian model and so on. As these variation function models are non-linear, non-linear model are converted to linear model when these variation function m...
Fuxian Lake located in the middle of Yunnan Province is second deepest lake in china. The water level of Fuxian Lake descends and its water area reduces in recent years owing to the climate changing. Therefore, it is crucial for rational utilization of lake resources to study the change trend of Fuxian Lake’s area. Landsat images from 1974 to 2014...
In many interpolation methods, with its simple interpolation principle, Inverse distance weighted (IDW) interpolation is one of the most common interpolation method. There are anisotropic spatial structures with actual geographical spatial phenomenon. When the IDW interpolation is used, anisotropic spatial structures should be considered. Geostatis...
Constructing a 3D model usually needs professional graphic technology and scanning equipment. This often in vast time consumption and high costing budgets. To solve the problem of high cost and complicated process, a simple, fast and low cost method is proposed. Firstly take images with 360 degree panorama of the object that is going to be modeled....
Citations
... The principal problem in the creation of such maps is the possibility to have upgraded and accurate systems based on near-real-time data. Besides the mapping traditionally conducted with geographic information systems technologies [1,2], artificial intelligence techniques are used to help better create these kinds of maps, and several authors in the literature have addressed this. For example, in various contributions [3][4][5], Nwazelibe et al. have demonstrated advanced mapping technologies for testing the performance of different algorithms in the landslide susceptibility mapping of Nigeria's Udi Province, which is a region known for incessant soil erosion and landslide events. ...
... Recent technological advances allowed researchers to obtain data from hard-to-reach areas, resulting in utilizing UAV in mountainous regions and regions with mass movements in a safe manner and with enhanced detail (Clapuyt et al. 2017;Macciotta et al. 2020;Rodriguez et al. 2020). Importantly, topographical changes in landslides can detect complex displacement patterns using subsequent DSMs (Digital Surface Model) (Conforti et al. 2021;Zhang et al. 2023). Other researchers have used the technique to calculate surface displacements caused by mining activities and earthquakes, which can be effectively monitored using UAVs (Deffontaines et al. 2017;Cwiakała et al. 2020). ...
... The use of both UAV photogrammetry and LiDAR is well documented in landslide literature due to their ability to reduce fieldwork efforts and enhance safety conditions in landslide data collection and analysis. These technologies allow to obtain significant results in terms of characterization, mapping, and modelling [34][35][36][37][38], enabling the monitoring of temporal and spatial dynamics in landslide processes ( [39] and references therein). Turning specifically to rock landslides, UAV photogrammetry and LiDAR are particularly useful for detecting source areas, extracting discontinuity and joint families, computing the volumes of involved rock masses, and modeling block trajectories [40][41][42][43][44]. ...
... It offers wide area coverage, continuous monitoring over time, and simultaneous assessment over large geographical areas. It helps identify trends and potential factors by acquiring data at different time intervals, reducing the need for extensive ground surveys (Zhang et al., 2023), but has limitations such as topographic errors and noise. This article addresses the land subsidence in East Baton Rouge Parish (EBRP) in Louisiana using InSAR Sentinel-1 images collected between 2017 and 2021. ...
... These issues significantly hinder the achievement of large-scale and high-precision numerical calculations for open-pit mines. With the development of unmanned aerial vehicle (UAV) technology, the use of oblique photogrammetry methods has emerged as a means to rapidly construct high-precision three-dimensional realistic models of open-pit mines, thereby compensating for the limitations of traditional methods [9][10]. ...
... The coastal zone's resources and environmental protection rely greatly on the extraction and analysis of the shoreline, which acts as the boundary between the land and the water [7]. The study will employ data from shoreline islands as it provides uncertainty information brought on by processes such as erosion, accretion, sedimentation, wind and wave patterns, and sea level rise. ...
... Moreover, the completeness of 3D models is also vital for the development of digital cities and real-scene 3D representations of China (Lu et al. 2014). Among them, full-automatic extraction and restoration of water-area, optimization of 3D point clouds and 3D model can be an important part of making 3D models reach a high level of completeness and improving the aesthetics and usability of urban scene 3D models (Mishra et al. 2023;Duan et al. 2021). ...
... For traffic land, although we lack direct traffic flow data on each road, the 130-m night-light data is used. This resolution is much better than commonly used data, such as the DMSP and the VIIRS, which have resolutions of 1 km and 500 m, respectively (Andries et al. 2023;Zhang et al. 2021). Because most vehicles turn their lights on during night travel, this method is feasible, as confirmed by other studies (Andreano et al. 2021;Kabanda 2020). ...
... However, many graduates lack practical skills in frontline positions [2][3][4]. These de ciencies include a disconnect between theory and practice, insu cient practical skills like data analysis and epidemic investigation, inadequate communication and collaboration abilities, and a lack of problem-solving capabilities for public health emergencies and complex health issues. ...
... In addition, other CNN-based models such as PSPNet [34], AlexNet [35], ResNet [36], U-Net [37], and DenseNet [38] have also been utilized for the semantic segmentation of landslides. Furthermore, target detection models represented by faster R-CNN [39] and the YOLO series [40][41][42] have also been applied to landslide recognition tasks. ...