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| 1 | COVID-19: Challenges to GIS with Big Data显示文摘The outbreak of the 2019 novel coronavirus disease(COVID-19)has caused more than 100,000 people infected and thousands of deaths.Currently,the number of infections and deaths is still increasing rapidly.COVID-19 seriously threatens human health,production,life,social functioning and international relations.In the fight against COVID-19,Geographic Information Systems(GIS)and big data technologies have played an important role in many aspects,including the rapid aggregation of multi-source big data,rapid visualization of epidemic information,spatial tracking of confirmed cases,prediction of regional transmission,spatial segmentation of the epidemic risk and prevention level,balancing and management of the supply and demand of material resources,and socialemotional guidance and panic elimination,which provided solid spatial information support for decision-making,measures formulation,and effectiveness assessment of COVID-19 prevention and control.GIS has developed and matured relatively quickly and has a complete technological route for data preparation,platform construction,model construction,and map production.However,for the struggle against the widespread epidemic,the main challenge is finding strategies to adjust traditional technical methods and improve speed and accuracy of information provision for social management.At the data level,in the era of big data,data no longer come mainly from the government but are gathered from more diverse enterprises.As a result,the use of GIS faces difficulties in data acquisition and the integration of heterogeneous data,which requires governments,businesses,and academic institutions to jointly promote the formulation of relevant policies.At the technical level,spatial analysis methods for big data are in the ascendancy.Currently and for a long time in the future,the development of GIS should be strengthened to form a data-driven system for rapid knowledge acquisition,which signifies ts that GIS should be used to reinforce the social operation parameterization of models and methods,especially when providing support for social management. | Chenghu Zhou Fenzhen Su Tao Pei An Zhang Yunyan Du Bin Luo Zhidong Cao Juanle Wang Wen Yuan Yunqiang Zhu Ci Song Jie Chen Jun Xu Fujia Li Ting Ma Lili Jiang Fengqin Yan Jiawei Yi Yunfeng Hu Yilan Liao Han Xiao | 2020 | Geography and Sustainability2020，1，1： | 13 |
| 2 | Scale effects of the continental coastline of China显示文摘空间规模是在地理的一个基本问题。海岸线的分数维的特征引起的规模效果成为沿海的地区经理和研究人员的一个普通焦点。在这研究,基于 DEM 和遥感图象,中国的多尺度的大陆人海岸线被提取,分数维的特征被分析。结果如下被显示出。(1 ) 中国的大陆人海岸线适合分数维的模型,并且分数维的尺寸是 1.195。(2 ) 有海岸线的分数维的尺寸的规模效果有重要差别根据高举并且沿着中国的大陆人海岸线的沉淀片断。(3 ) 海岸线的分数维的尺寸根据海岸线类型有重要空间异质。位于 Luanhe 河平原的沙的海岸线的分数维的尺寸是 1.109。位于北江苏平原的泥泞海岸线的尺寸是 1.059,当沿着东南的福建的岩石海岸线的是 1.293 时。(4 ) 岩石海岸线的长度被规模多于泥泞、沙的海岸线的影响。因为海岸线是海的连词,登陆并且通风表面,海岸线规模效果的学习是为关于在 multi-scales 的 air-sea-land 相互作用的研究的科学的底之一。 | SU Fenzhen GAO Yi ZHOU Chenghu YANG Xiaomei FEI Xianyun | 2011 | Journal of Geographical Sciences2011，21，6： | 8 |
| 3 | Basic theory and key technologies for marine geographic information system显示文摘Marine geographic information system (MGIS) has great ability to deal with the spatio-temporal problems and has potential superiority when it is applied to oceanography. Using the feature extraction of oceanic phenomena as a case study, the functions of the MGIS are analyzed, and thus the position of MGIS in the oceanography is defined. Comparing the requirement of MGIS with that of the traditional GIS which has been developed in the terrestrial applications in the past four decades, the frame for the functions of MGIS is constructed. According to the established MGIS, some key technologies are discussed in detail with emphasis on the specialities which can distinguish the MGIS from the traditional GIS. | SU Fenzhen YANG Xiaomei XU Jun ZHANG Tianyu LUO Jiancheng | 2006 | Acta Oceanologica Sinica2006，25，2： | 8 |
| 4 | Spatial and Temporal Variability of Thermal Stress to China's Coral Reefs in South China Sea显示文摘Coral bleaching, caused by elevated sea surface temperature(SST), is occurring more frequently and seriously worldwide. Due to the lack of field observations, we understand little about the large-scale variability of thermal stress in the South China Sea(SCS) and its effect on China's coral reefs. This paper used 4-km high resolution gap-filled SST(Filled SST) data and thermal stress data related to coral bleaching derived from Coral Reef Temperature Anomaly Database(Co RTAD) to quantify the spatial and temporal characteristics of chronic thermal stress and acute thermal stress to China's coral reefs in SCS from 1982 to 2009. We analyzed the trend of SST in summer and the thermal stress frequency, intensity and duration during this period. The results indicate that, as a chronic thermal stress, summer mean SST in SCS shows an average upward trend of 0.2℃/decade and the spatial pattern is heterogeneous. Waters of Xisha Islands and Dongsha Islands of the northern SCS are warming faster through time compared to Zhongsha Islands and Nansha Islands sea areas of the southern SCS. High frequency bleaching related thermal stress events for these reefs are seen in the area to the northwest of Luzon Island. Severe anomaly thermal stress events are more likely to occur during the subsequent year of the El Nino year for these coral reefs. Besides, the duration of thermal stress varies considerably by anomaly year and by region. | ZUO Xiuling SU Fenzhen WU Wenzhou CHEN Zhike SHI Wei | 2015 | Chinese Geographical Science2015，25，2： | 7 |
| 5 | A model of sea surface temperature front detection based on a threshold interval显示文摘A model(Bayesian oceanic front detection, BOFD) of sea surface temperature(SST) front detection in satellite-derived SST images based on a threshold interval is presented, to be used in different applications such as climatic and environmental studies or fisheries. The model first computes the SST gradient by using a Sobel algorithm template. On the basis of the gradient value, the threshold interval is determined by a gradient cumulative histogram. According to this threshold interval, front candidates can be acquired and prior probability and likelihood can be calculated. Whether or not the candidates are front points can be determined by using the Bayesian decision theory. The model is evaluated on the Advanced Very High-Resolution Radiometer images of part of the Kuroshio front region. Results are compared with those obtained by using several SST front detection methods proposed in the literature. This comparison shows that the BOFD not only suppresses noise and small-scale fronts, but also retains continuous fronts. | PING Bo SU Fenzhen MENG Yunshan FANG Shenghui DU Yunyan | 2014 | Acta Oceanologica Sinica2014，33，7： | 5 |
| 6 | Oceanographic ontology-based spatial knowledge query显示文摘The construction of oceanographic ontologies is fundamental to the 'digital ocean'. Therefore, on the basis of introduction of new con-cept of oceanographic ontology, an oceanographic ontology-based spatial knowledge query (OOBSKQ) method was proposed and de-veloped. Because the method uses a natural language to describe query conditions and the query result is highly integrated knowledge,it can provide users with direct answers while hiding the complicated computation and reasoning processes, and achieves intelligent,automatic oceanographic spatial information query on the level of knowledge and semantics. A case study of resource and environmen-tal application in bay has shown the implementation process of the method and its feasibility and usefulness. | WANG Jinggui SU Fenzhen ZHOU Chenghu DU Yunyan YANG Xiaomei | 2005 | Acta Oceanologica Sinica2005，24，4： | 2 |
| 7 | Constructing a raster-based spatio-temporal hierarchical data model for marine fisheries application显示文摘Marine information has been increasing quickly. The traditional database technologies have disadvantages in manipulating large amounts of marine information which relates to the position in 3-D with the time. Recently, greater emphasis has been placed on GIS (geographical information system)to deal with the marine information. The GIS has shown great success for terrestrial applications in the last decades, but its use in marine fields has been far more restricted. One of the main reasons is that most of the GIS systems or their data models are designed for land applications. They cannot do well with the nature of the marine environment and for the marine information. And this becomes a fundamental challenge to the traditional GIS and its data structure. This work designed a data model, the raster-based spatio-temporal hierarchical data model (RSHDM), for the marine information system, or for the knowledge discovery from spatio-temporal data, which bases itself on the nature of the marine data and overcomes the shortages of the current spatio-tempo- ral models when they are used in the field. As an experiment, the marine fishery data warehouse (FDW) for marine fishery manage- ment was set up, which was based on the RSHDM. The experiment proved that the RSHDM can do well with the data and can extract easily the aggregations that the management needs at different levels. | SU Fenzhen ZHOU Chenhu ZHANG Tianyu | 2006 | Acta Oceanologica Sinica2006，25，1： | 2 |
| 8 | Optical and SAR image registration based on improved nonsubsampled wavelet transform for sea islands显示文摘Homologous feature point extraction is a key problem in the optical and synthetic aperture radar(SAR) image registration for islands. A new feature point extraction method using a threshold shrink operator and non-subsampled wavelet transform(TSO-NSWT) for optical and SAR image registration was proposed. Moreover, the matching for this proposed feature was different from the traditional feature matching strategies and was performed using a similarity measure computed from neighborhood circles in low-frequency bands. Then, a number of reliably matched couples with even distributions were obtained, which assured the accuracy of the registration. Application of the proposed algorithm to SPOT-5(multi-spectral) and YG-1(SAR) images showed that a large number of accurately matched couples could be identified. Additionally, both of the root mean square error(RMSE) patterns of the registration parameters computed based on the TSO-NSWT algorithm and traditional NSWT algorithm were analyzed and compared, which further demonstrated the effectiveness of the proposed algorithm. The algorithm can supply the crucial step for island image registration and island recognition. | SHI Wei SU Fenzhen WANG Ruirui LU Yongduo | 2014 | Acta Oceanologica Sinica2014，33，5： | 1 |
| 9 | CBR spatial similarity analysis on mesoscale ocean eddies with remote sensing data显示文摘 | Yunyan Du Ce Li Fenzhen Su Tianyu Zhang & Xiaomei Yang | 2004 | Indian Journal of Marine Sciences2004，，33： | 1 |
| 10 | A data-mining approach to determine the spatio-temporal relationship between environmental factors and fish distribution显示文摘 | Fenzhen Su Chenghu Zhou Vincent Lyne Yunyan Du Wenzhong Shi | 2004 | Ecological Modeling2004，174，4： | 1 |
| 11 | Integration technology research on marine geographical information system显示文摘It is urgent and necessary to integrate a marine geographical information system (MGIS) with marine remote sensing detection modules. On the basis of the current technology and features of applications, an open three-layer integration framework is designed. At the data layer, a two-level three-base integration mechanism based on the plug-in technology is applied; At the function layer, an integration mode based on API, DLL, EXE and COM is discussed; and at the application layer, a sharing mechanism based on the clients/service is adopted. As an example, the remote sensing integrated application information system of China's coastal zone and offshore (MaXplorer1.0) with multiecology remote sensing fusion and assimilation module, surge detection module as well as eight other thematic application modules is integrated, and the key technology of integration is discussed at different layers and in different modules. The result shows that it is possible to realize the conformity of technology and resources and to provide the incorporate technology platform for marine information operational functioning after applying the integration | XUE Cunjin SU Fenzhen DU Yunyan YANG Xiaomei | 2008 | Acta Oceanologica Sinica2008，27，6： | 1 |
| 12 | Multisource Marine Environmental Information Grid Platform and Its Prototype System Research显示文摘Based on the advantages of the openness,flexibility,high-efficiency,intelligence,and safety of grid,this paper focuses on the methods of marine environmental information sharing and integration in grid environment.According to the characteristics of marine information,which includes multisource,dynamic,and high-dimensional,this paper provides a framework and the technical solution for a multisource marine environmental information grid platform.As an experiment,the prototype takes the region of South China Sea as its study area and chooses three kinds of marine environmental information as the representative types for the marine information.The realization of the prototype of multisource marine environmental information grid platform shows the feasibility and practicality of the framework and the technical solution. | XIAO Rulin SU Fenzhen DU Yunyan YANG Feng HE Yawen | 2010 | Geo-Spatial Information Science2010，13，4： | 0 |
| 13 | Uncertainty Representation of Ocean Fronts Based on Fuzzy-Rough Set Theory显示文摘Analysis of ocean fronts’ uncertainties indicates that they result from indiscernibility of their spatial position and fuzzi- ness of their intensity. In view of this, a flow hierarchy for uncertainty representation of ocean fronts is proposed on the basis of fuzzy-rough set theory. Firstly, raster scanning and blurring are carried out on an ocean front, and the upper and lower approximate sets, the indiscernible relation in fuzzy-rough theories and related operators in fuzzy set theories are adopted to represent its uncer- tainties, then they are classified into three sets: with members one hundred percent belonging to the ocean front, belonging to the ocean front’s edge and definitely not belonging to the ocean front. Finally, the approximate precision and roughness degree are util- ized to evaluate the ocean front’s degree of uncertainties and the precision of the representation. It has been proven that the method is not only capable of representing ocean fronts’ uncertainties, but also provides a new theory and method for uncertainty representation of other oceanic phenomena. | XUE Cunjin ZHOU Chenghu SU Fenzhen ZHANG Dandan | 2008 | Journal of Ocean University of China2008，7，2： | 0 |
| 14 | Spatial information recognizing of ocean eddies based on virtual force field and its application显示文摘A new approach to detecting ocean eddies automatically from remote sensing imageries based on the ocean eddy's eigen-pattern in remote sensing imagery and 'force field-based shape extracting method' is proposed. First, the analysis on extracting eddies' edges from remote sensing imagery using conventional edge detection arithmetic operators is performed and returns digitized vector edge data as a result. Second, attraction forces and fusion forces between edge curves were analyzed and calculated based on the vector eddy edges. Thirdly, the virtual significant spatial patterns of eddy were detected automatically using iterative repetition followed by optimized rule. Finally, the spatial form auto-detection of different types of ocean eddies was done using satellite images. The study verified that this is an effective way to identify and detect the ocean eddy with a complex form. | LI Ce DU Yunyan SU Fenzhen YANG Xiaomei XU Jun | 2007 | Acta Oceanologica Sinica2007，26，4： | 0 |
| 15 | Whether human-induced activities could change the gradient pattern of coastal land use along the sea-land direction:a case study in Manila Bay,Philippines显示文摘Increasing intense human activities have largely changed the coastal landscape and caused many environmental issues.However,whether human-induced activities could change the coastal land use gradient pattern,an important coastal zonal characteristic along the sea-land direction,remains unclear.Manila Bay was selected as the study area in this work.According to the distance of the land use and land cover(LULC)to the coastline,we clustered the typical coastal land use sequence patterns(CLUSPs)along the sea-land direction between 1988 and 2016 in Manila Bay and found the following.(1)Four typical CLUSPs,including the natural CLUSP dominated by forest land and grassland,the agricultural CLUSP dominated by dry farm and paddy field,the urbanised CLUSP dominated by construction land and the fishery CLUSP dominated by fishing farm,were mined in 1988.Three typical CLUSPs(a natural CLUSP,an intermediate CLUSP between the agricultural and urbanised CLUSPs,and a fishery CLUSP)were mined in 2016.(2)Affected by the dominant LULC,these typical CLUSPs showed a regular spatial pattern along the sea-land direction.For example,the typical natural CLUSP showed a landward pattern due to the long distance between the forest land and grassland and the coastline.(3)However,influenced by urban and aquaculture expansion,the land intensification of the CLUSP exhibited an obvious increase and caused the decrease of the CLUSP diversity from 1988 to 2016.The increase in the area of LULC coverage showed no obvious correlation with its distance from the coastline(DFC),but the net increase rate of LULC coverage had a significant negative correlation with the DFC.Therefore,human-induced activities have a large impact on the gradient pattern of coastal land use along the sea-land direction. | Zhi Ding Fenzhen Su Yanan Chen Ying Liu Xue Feng Wenqiu Hu Fengqin Yan He Li Pujia Yu Xuguang Tang | 2023 | Acta Oceanologica Sinica2023，42，2： | 0 |
| 16 | High-resolution global mature and young oil palm plantation subclass maps for 2020显示文摘Accurate high-resolution maps of oil palm plantations underpin effective management of environmental and socio-economic impacts at global,regional,and national levels.However,young industrial and highly irregular small-holder plantations are mostly unmapped and not included in official FAO statistics.This issue is addressed here by discriminating global oil palm plantation in 2020 into four subclasses:Industrial Mature Oil Palm(IMOP);Industrial Young Oil Palm(IYOP);Smallholder Mature Oil Palm(SMOP);and Smallholder Young Oil Palm(SYOP).Data,resolved to 4.77 m,from Planet&NICFI,Sentinel-1/2,were combined with other layers using the image-oriented classification and regression tree(CART)algorithm which performed best in classification tests.Results show that SMOP dominates distributional extent,but it was also the most accurately mapped subclass typically found at 500–1000 m altitude.IMOP had the most extensive altitude range of 500–1300 m,while IYOP and SYOP were found at similar altitudes of 500–800 m and 500–900 m respectively.Recent developments in South East Asia show oil palm plantations expanding into new areas with a slope of 24 degrees.Results provide data to support Sustainable Development Goal by assisting future oil palm-related development planning and monitoring in the world’s major oil palm-growing countries. | You Xu Dongjie Fu Hao Yu Fenzhen Su Vincent Lyne Rong Fan Bin He Tingting Pan Jiasheng Tang | 2023 | International Journal of Digital Earth2023，16，1： | 0 |
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