• Title, Summary, Keyword: Temporal GIS

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The Integration of Mobile GIS and Spatio-temporal Database for Evaluating Space-time Accessibility of an Individual: An Approach Based on Time Geography Model

  • Lee Yang-Won;Shibasaki Ryosuke
    • Proceedings of the KSRS Conference
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    • pp.753-758
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    • 2005
  • This study attempts at building an integrated GIS computing framework for evaluating space-time accessibility of an individual with the approach of time geography model. The proposed method is based on the integration of mobile GIS and object-relational spatio-temporal database. Three components are central to our system: ( i ) mobile GIS application that transmits spatio-temporal trajectory data of an individual; ( ii ) spatio-temporal database server that incorporates the time geography model; and (iii) geovisualization client that provides time geographic queries to the spatio-temporal database. As for the mobile GIS application, spatio-temporal trajectory data collected by GPS-PDA client is automatically transmitted to the database server through mobile data management middleware. The spatio-temporal database server implemented by extending a generic DBMS provides spatio-temporal objects, functions and query languages. The geovisualization client illustrates 3D visual results of the queries about space-time path. space-time prism and space-time accessibility. This study shows a method of integrating mobile GIS and DBMS for time geography application, and presents an appropriate spatio-temporal data model for evaluating space-time accessibility of an individual.

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Design and Implementation of a Data Management System for Mobile Spatio-Temporal Query (모바일 시공간 질의을 위한 데이타 관리 시스템의 설계 및 구현)

  • Lee, Ki-Young;Lim, Myung-Jae;Kim, Joung-Joon;Kim, Kyu-Ho;Kim, Jeong-Lae
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.11 no.1
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    • pp.109-113
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    • 2011
  • Recently, according to the development of ubiquitous computing, the u-GIS which not only used in u-Transport, u-Care, u-Fun, u-Green, u-Business, u-Government, and u-City but also used to provides various spatial information such as the location of user is being the core technology of the ubiquitous computing environment. In this paper, we implemented an mobile spatio-temporal Query Processing Systems for handling the Spatio-Temporal Data in mobile equipment.The mobile spatio-temporal Query Processing Systems provides the spatio-temporal data type and the spatio-temporal operator that is expanded by the spatial data type and the spatial operator from OepenGIS "Simple Feature Specification for SQL". It supports arithmetic coding compression techniques that is considered with a spatio-temporal data specific character. It also provides the function of data cashing for improving the importation and exportation of the spatio-temporal data between a embedded spatio-temporal DBMS and u-GIS server.

Spatio-Temporal Query Processing System based on GML for The Mobile Environment (모바일 환경을 위한 GML 기반 시공간 질의 처리 시스템)

  • Kim, Joung-Joon;Shin, In-Su;Won, Seung-Ho;Lee, Ki-Young;Han, Ki-Joon
    • Spatial Information Research
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    • v.20 no.3
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    • pp.95-106
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    • 2012
  • Recently, with increase and development of the wireless access network area, u-GIS Service is supported in various fields. Especially, spatio-temporal data is used in the mobile environment for the u-GIS service. However, there is no standard for the spatio-temporal data used in different spaces, spatio-temporal data processing technology is necessary to makes interoperability among mobile u-GIS services. Furthermore, it is also necessary to develop the system of gathering, storing, and managing the spatio-temporal data in consideration of small capacity and low performance of mobile devices. Therefore, in this paper, we designed and implemented a spatio-temporal query processing system based on GML to manage spatio-temporal data efficiently in the mobile environment. The spatio-temporal query processing system based on GML can offer a structured storage method which maps a GML schema to a storage table and a binary XML storage method which uses the Fast Infoset technique, so as to support interoperability that is an important feature of GML and increase storage efficiency. we can also provide spatio-temporal operators for rapid query processing of spatio-temporal data of GML documents. In addition, we proved that this system can be utilized for the u-GIS service to implement a virtual scenario.

A Study on Temporal Map for Spatio-temporal Analysis (시.공간분석을 위한 GIS기법의 시간 지도 구현에 관한 연구 - 안양시틀 사례로 -)

  • 오충원
    • Journal of the Korean Geographical Society
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    • v.37 no.2
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    • pp.191-202
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    • 2002
  • Characteristics and patterns of geographic features and human activities can be interpreted in terms of spatiality and temporality. The necessity to record the historical changes and the ability to reason in the real world has lead to a new field of research so called Integrated Spatio-Temporal analysis. The objective of this study is to investigate temporal maps for Spatio-temporal analysis, which have the integration functionality for visualizing spatiality and temporality of the geographic appearances and human activities. Land information is composed of spatial, attribute and temporal data and requires spatio-temporal representations. It is possible to visualize spatio-temporal variations with spatio-temporal databases and temporal map produced by integrated data models. This study constructs spatio-temporal model for temporal maps of land price variation analysis. Taking advantage of the spatio-temporal model proposed here, it is possible to visualize spatio-temporal variations with spatio-temporal database and temporal map. On a practical level, this study would be extended and utilized to various geographic features.

Towards 4-dimensional Geographic Information Systems

  • Lee, Seong-Ho;Park, Jong-Hyun
    • Proceedings of the KSRS Conference
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    • pp.473-475
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    • 2003
  • To overcome the limitation that traditional GISs lose much information for the real world, 4-dimensional GIS has the additional reference systems including object's height and temporal dimension. This paper describes the 4-dimensional geometric object model and components. The prototype for 4-dimensional GIS consists of the data provider, manager, and renderer components. We show the virtual city that its database contains topographic maps, buildings, roads and temporal history data. This provides spatial, temporal operations and analysis functions.

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Development of a Spatio-Temporal Query Processing System for Mobile Devices (모바일 장치용 시공간 질의 처리 시스템의 개발)

  • Shin, In-Su;Yang, Hyeong-Sik;Kim, Joung-Joon;Han, Ki-Joon
    • Journal of Korean Society for Geospatial Information System
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    • v.20 no.2
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    • pp.81-91
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    • 2012
  • As the recent development of the ubiquitous computing environment, u-GIS is being highlighted as the core technology of the ubiquitous computing environment, and thereby, studies on spatio-temporal data are being actively conducted. In this u-GIS environment, it is still difficult for existing mobile devices to efficiently manage the massive spatio-temporal data of u-GIS that are increasing day by day. Therefore, this paper develops a spatio-temporal query processing system for mobile devices in order to solve the problem. The system provides various spatio-temporal operators to insert/delete/update/search spatio-temporal data and supports a query optimization function that uses a spatio-temporal index for the flash memory and a spatio-temporal histogram for guaranteeing query execution speed. Lastly, by applying the spatio-temporal query processing system developed in this paper to the virtual scenario, this paper has proved that the system can be utilized in various application fields necessary to process spatio-temporal data in the mobile environment.

Discussion on Spatio-temporal Modeling

  • Tingting, Mao;Yu, Liu;Baojia, Lin;Lun, Wu
    • Proceedings of the KSRS Conference
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    • pp.178-181
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    • 2003
  • The temporal GIS data modeling methods are discussed in this paper. At first, two conceptual models of spatio-temporal data are introduced, and then some typical STDMs based on these two models are summed up and compared. After that, the spatio-temporal changes are analyzed thoroughly, and then how to model spatio -temporal data from different aspects is discussed. At last, several issues that need further research are pointed out.

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Geocomputation with Spatio-Temporal Database for Time Geography Application (시간지리학 응용을 위한 시공간데이터베이스 기반의 GIS 컴퓨팅 연구)

  • Park Key-Ho;Lee Yang-Won;Ahn Jae-Seong
    • Spatial Information Research
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    • v.13 no.3
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    • pp.221-237
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    • 2005
  • This study attempts at building a GIS computing environment that incorporates object-relational spatio-temporal database for the time geography model with space-time path, space-time prism and space-time accessibility. The proposed computing environment is composed of ( i ) mobile GIS application for collecting spatio-temporal trajectory data of an individual, ( ii ) spatio-temporal database server that includes time geography model, and (iii) geovisualization client that performs time geographic queries to the spatio-temporal database. The spatio-temporal trajectory data collected by GPS-PDA client is automatically processed and sent to server through data management middleware. The spatio-temporal database implemented by extending a generic DBMS provides spatio-temporal objects, functions, and SQL. The geovisualization client illustrates 3D visual results of the queries about space-time path, space-time prism, and space-time accessibility. This study confirms the possibility of integrating mobile GIS and DBMS for time geography model, and it presents the appropriate database model with spatio-temporal objects and functions that may handle very large data for time geography application.

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EVALUATING AND EXTENDING SPATIO-TEMPORAL DATABASE FUNCTIONALITIES FOR MOVING OBJECTS

  • Dodge Somayeh;Alesheikh Ali A.
    • Proceedings of the KSRS Conference
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    • pp.778-784
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    • 2005
  • Miniaturization of computing devices, and advances in wireless communication and positioning systems will create a wide and increasing range of database applications such as location-based services, tracking and transportation systems that has to deal with Moving Objects. Various types of queries could be posted to moving objects, including past, present and future queries. The key problem is how to model the location of moving objects and enable Database Management System (DBMS) to predict the future location of a moving object. It is obvious that there is a need for an innovative, generic, conceptually clean and application-independent approach for spatio-temporal handling data. This paper presents behavioral aspect of the spatio-temporal databases for managing and querying moving objects. Our objective is to impelement and extend the Spatial TAU (STAU) system developed by Dr.Pelekis that provides spatio-temporal functionality to an Object-Relational Database Management System to support modeling and querying moving objecs. The results of the impelementation are demonstrated in this paper.

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Representation and History Management of Spatio-Temporal Objects using a Gothic GIS Tool (고딕 GIS 도구를 이용한 시공간 객체의 표현과 이력관리)

  • Paik, Ju-Yeon;Lee, Seong-Jong;Ryu, Keun-Ho
    • Journal of KIISE:Databases
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    • v.27 no.1
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    • pp.101-112
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    • 2000
  • In Geographic Information System, spatial object can be changed in the attribute information, spatial location and the topological relation between them with the change of time. However traditional GIS deletes the old value of aspatial information and replaces them with new value. Therefore. it is difficult to manage thc history of changed spatial object and can not support the spatio-temporal queries including temporal queries. In this paper, we propose a spatio-temporal objected model to solve this problem. We implement the proposed model with spatio-temporal class using Gothic GIS tool. The historical information of an object is stored into the object itself for the effective history management. And, in order to provide the queries for the history of an object and spatio-temporal relationship, we add temporal operators, spatio-temporal operators, and spatio-temporal query operations into Gothic, and improve the facility of the Gothic.

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