Spatial Information Platform Research Articles

A dynamic topology analysis method for multi-ship encounters based on multi time-space network trees

This paper innovatively proposes a novel approach of topological analysis in the dynamic time-space domain of ship encounters under the joint action of multi-space network structural elements, based on the GIS spatial information platform and spatial topology analysis theory. The proposed method based on the ship's navigational motion information, encounter dynamic mode, relative time-space position distribution, etc., the method divides and intersects the time-space domain of the ship's encounter dynamics, and establishes an encountering dynamic time-space network tree in which space and attribute elements are collaboratively associated during the navigation. From the perspective of network topology analysis, the high-precision analysis of the spatial coupling characteristics and time-space trends of potential encountered dangers during ships dynamic navigation is achieved. To verify the effectiveness of the method, real encounter scenarios of M/T SANCHI and M/V CF Crystal were used as analysis cases. The results showed that the proposed method can precisely extract spatial relationships and spatio-temporal coupling feature information of potential hazards encountered between ships, with an average error of about 2.54% and an overall error between 1.94% and 3.53%.Simultaneously, the method's time efficiency results are thoroughly studied and compared, and it is discovered that the proposed method has good stability.

Spatial modeling and analysis based on spatial information of the ship encounters for intelligent navigation safety

The analysis of dangerous navigation situations is crucial for the advancement of intelligent shipping technology. In this study, we propose a spatial modeling and analysis method in the space domain of ship encounters based on a geographic information system spatial information platform and analysis technology. The proposed method employs various parameters, such as the approaching rate of a ship, the relative orientation, the encounter danger, the relative spatial position, and the power coefficient of the exponential mathematical curve to establish a dynamic spatial–temporal model of ship encounters. This allows for the spatial modeling and analysis of the spatial characteristics and distributions of encounter-danger surface sources. The proposed method enables in-depth analysis of potential nonlinear spatial characteristics and distribution patterns of ship-encounter danger during navigation and provides spatial analysis results, including encounter-safety features and spatial–temporal attribute information for safe ship navigation. This can greatly improve the spatial analysis and perception ability of ships encountering dangerous situations, thereby effectively reducing the spatial ambiguity of encountering danger. This study performs case analysis and comparative verification using two types of encounter scenarios, and the results reveal the accuracy and superiority of the proposed method.

Spatial modeling and analysis approach for ship-encounters dynamic spatial–temporal domain

One of the crucial issues at the forefront of smart ship development that urgently needs solutions is navigational situation safety awareness technology. The development of intelligent navigation safety technology is severely constrained by the issue of challenging mining and accurate measurement of ship encounter dynamic space-time variation law and unknown nonlinear spatial representation information. This work creatively offers a GIS spatial modeling and analysis method based on the dynamic space-time domain of ship encounters, based on the GIS spatial information platform and spatial analysis theory. Based on the ship's approaching rate, encounter hazard identification parameters, relative space-time position distribution, etc., combined with the normal distribution function of the spatial distance adjustment variable, the method successfully constructs a multi-time-space, multi-angle, and multi-state encounter space model. By efficiently reducing the ambiguity of the spatial distribution of hazards, it realizes the in-depth analysis of the spatial distribution features of potential hazards as well as the temporal and spatial trends in the dynamic process of ship navigation. To break through the technical problems of spatial analysis and perception of ship-encountered dangerous area sources. It offers a fresh approach for enhancing intelligent navigation's capacity for safety analysis of ship interactions.

Wireless Multifunctional Display Platform for Visual Communication Design Based on IoT Big Data

An important role of display visual design is advertising and advertising communication, which is an integrated medium, that is, a medium for communicating information. Visual communication design is the most direct way of information transmission in modern society. In today’s increasingly complex and diversified information, visual communication design has been more and more widely used in terms of form and function. On the display platform, the use of visual elements and the expression of visual communication design allows us to examine the different spatial experiences that visual communication design brings to people from a new perspective and adjust the way it is communicated, so as to find a scientific expression. This paper focused on the role of visual communication in display design and discussed its specific application in display design. The use of visual elements in the display space provides a new visual platform for spatial information, making the space design more connotative and cultural. For the smooth experience of media fusion design, it is necessary to ensure that information can be transmitted quickly and smoothly in every link of its processing. In the data write throughput experiment of the microperceptual data layer, the maximum write speed increased by 85.2% compared with the direct write method using the TSBPS method. The findings demonstrated that the IOT-HSQM model’s strategy of first queuing and then segmentation writes may more effectively fulfill the demands of high bandwidth than straight data transmission to HDFS (Hadoop Distributed File System).

A Decision Support System for Marine Regulation

The implementation of marine spatial data management and decision support based on GIS provides a powerful tool for marine regulation. This study constructed a three-dimensional spatiotemporal data model of marine resources that is hierarchical, partitioned, and classified according to the management principle of using an underground resource layer, surface matrix layer, surface overburden layer, and management layer, taking the marine resource entity as the unit. Key research topics include marine multi-source information integration, visual expression, and spatiotemporal topology analysis for typical application scenarios such as sea area use, island development and utilization, and marine environmental monitoring and protection. The study developed a marine information decision support system with comprehensive integration and visual analysis of information on maritime islands, early warning and monitoring, the marine economy, and the marine environment. The system was applied to dynamic regulation of sea area use, spatiotemporal characteristic analysis of marine resources, the regulation of human activities in marine protected areas, and the monitoring of sea level rise. Practice has proved that a three-dimensional spatiotemporal data model of marine resources can meet the application requirements of “One Map”, the basic land and spatial information platform.

Spatial Information Platform with VWorld for Improving User Experience in Limited Web Environment

VWorld Data Center (VDC), operated by the Ministry of Land, Infrastructure, and Transport of South of Korea, provides the latest high-quality spatial information of South Korea. VWorld data include aerial images, digital elevation models, 3D buildings, 3D bridges, roads, administrative information, etc. We present a 3D spatial information platform that uses VWorld data. This platform is based on the web browser environment and supports cross platform by complying with WebGL and web standards. The 3D-terrain tile structure has a quadtree-based detail level for high-resolution rendering. When rendering different tile levels or sizes simultaneously, abnormal gaps occur between the tiles. We propose the use of a specially shaped 3D terrain object model to minimize these gaps. This model can be used and verified using the service site of the WebGL-based VWorld spatial information platform. Our platform has a limited environment and runs in a web browser while requesting real-time spatial information data from VDC. VWorld data cannot be stored locally by policy. We improve the frame rate in such way that it can easily be used in a limited web browser environment or even a computing environment without a graphics processing unit. We intend to officially present the proposed method to the VDC and apply it. We expect our platform to be used for various web-based geospatial applications.

DESIGN OF APPLICATION ARCHITECTURE FOR 3D SAFETY STATUS INFORMATION PLATFORM

Abstract. The Korean Government has executed the research project named “The development of spatial information-based high-reality contents provision technology for disaster management”. The goal of this project is to develop and verify a Safety Index Map and a 3D safety status information platform for spatial information based customized disaster management service. This paper deals with the design of application architecture for spatial information based 3D safety state information platform. First, we analysed the use cases of existing disaster management platform and the needs of business users. Second, based on the analysed results, target facilities were selected and possible service scenarios were created. Finally, we designed application architecture with service development strategy and users’ requirements. The results of this research could be used for detail design of technical architectures (DA/SA/HA/NA).

Spatial Analysis of Urbanization in Major Asian and African Cities

Abstract. The world statistics shows that 54% of the world population had been accumulated in urbanized areas by 2014. It is estimated that the global urban population will be increasing up to 66% of the total by 2050. According to the United Nations (UN) projection, the urbanization will be faster in Asian and African countries than the other continents. It is obvious this rapid increase will bring about serious socio-economic and environmental problems in the near future. Thus the geographical thinking of urbanization is becoming a vital topic to introduce proper urban planning for the future sustainability.Many geographers have focused on the urbanization pattern and process of the developing countries during the last two decades. In this connection, the scarcity of the spatial data has been an obstacle to study quantitatively urbanization especially in Asian and African cities. Based on this background, since the 2000s, the Division of Spatial Information Sciences, University of Tsukuba, has conducted the research to establish the city-based spatial information platform to overcome this obstacle, i.e., the lack of the data. The main objective of this project is to capture the urbanization pattern and process over the time by using Remote Sensing (RS) and Geographical Information Systems (GIS) techniques. The data on land use and land cover, land surface temperature, energy consumption, and population density are now available with the same spatial resolution in terms of selected cities.Our goal is to open the web-based GIS system to provide the geospatial database of Asian and African cities and scientifically discuss the urban sustainability by using scenario-based simulation. The projected future scenario will be useful for the urban policy by the “back-casting method.”

Evaluating patent tendency for UAV related to spatial information in South Korea

Unmanned aerial vehicle (UAV) is very quickly emerging as a new platform for spatial information to operate in the research and development (R&D) field for the last few years. This paper presents mega-trends for patent registration to explore appropriate R&D strategy on UAV related to spatial information in South Korea. In order to analyze mega-trends of UAV technologies, patent analysis is conducted focusing on published/registered patents of South Korea. Total numbers of UAV patents gradually increased in 2006–2015, and rapidly increased in 2016. About 1/5 of the total UAV patents related to spatial information were registered by major government research institutes, mainly related to aviation industries. The most interesting finding was that non-typical spatial information companies were actively registering UAV patent utilizing spatial information (e.g., solar power, agriculture, facility management etc.) during last 2 or 3 years. The results serve as a valuable resource for UAV R&D decision-making in spatial information-related organizations by presenting UAV patent registration trends in South Korea.

The application of urban climatic mapping to the urban planning of high-density cities: The case of Kaohsiung, Taiwan

There is a need to create sustainable urban development and quality living environments for the growing urban populations of high-density cities. Sustainable urban planning of high-density cities from the urban climatic point of view is a topical issue for city planners and policy makers. However, the application of urban climatic knowledge has only led to low-impact urban planning decision-making. This is especially true in high-density cities in developing countries. Thus, there is an urgent need to seek ways to quickly collate urban climatic information for planning in a format that is user-friendly for planners. This study has identified ways to promote the use of urban climatic knowledge in planning. By utilizing readily-available data, the paper introduces a method that focuses on urban planning using an urban climatic map (UCMap). A UCMap provides a visual and spatial information platform for the planner-friendly Geographical Information System (GIS). By focusing on Kaohsiung, Taiwan, the study first defines the urban climatic issues in the area. It then introduces the key methodology of urban climatic mapping and elaborates on general urban-climatic-based planning advice for planners using a UCMap. Lastly, it identifies sensitive areas and provides planning recommendations that can be easily tested and applied by city planners. The critical importance of urban greenery and coverage, urban air paths and open spaces, water bodies and rivers, and building morphology and layout have been highlighted visually and spatially for planners.