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At the dawn of the 21^<st> century, unlike any other time in history, mankind is keenly aware of the necessity to understand and protect the environment for its own survival. Consorted action is being taken by the governments and international organizations backed by a host of scientific studies and initiatives towards achieving this goal. With this background, it is very pertinent to hold the International Symposium on Geolnformatics for Spatial-Infrastructure Development in Earth and Allied Sciences (GIS-IDEAS : http://gisws.media.osaka-cu.ac.jp/gisideas/) in Hanoi, Vietnam, from 25-28 September 2002 under the aegis of the Japan-Vietnam Geoinformatics Consortium (JVGC : http://gisws.media.osaka-cu.ac.jp/jvgc/). In recent years Vietnam is experiencing steady growth and is poised to take off in rapid economic development. Geoinformatics can and should play a crucial role in this process, by assisting the development process through enhanced analytical capabilities in the planning and at the same time helping to ensure that negative impacts on society and environment are minimized. The technical sessions at the GIS-IDEAS Symposium consisted of 50 oral presentations and 18 interactive poster presentations covering a wide spectrum of topics in geoinformatics. The themes included a) remote sensing applications, b) socio-informatics, c) landuse/landcover mapping, d) groundwater modeling and management, e) flood and erosion - modeling and mitigation, f) spatial data management and sharing, g) spatial modeling and quantitative analysis, h) geoinformatics education, and i) change detection. Among these presentations 11 contributions were selected for this special issue and 12 contributions are slated to appear in the Special Issue of our sister journal, Asian Journal of Geoinformatics in March 2003. This Special Issue of GIS-IDEAS covers topics related landuse/land-cover mapping flood and erosion modeling and geologic applications presented at the GIS-IDEAS symposium. Two papers deal with the difficult and challenging area of geological mapping and modeling, with Mitamura reporting on construction of geologic structure of Osaka plain, Japan from different data sources while Nghi et al. describe the development of a GIS database that depict the space-time evolution of Holocene sedimentary processes in Balat River Mouth, Vietnam. Three papers deal with landcover/landuse information. Son addresses the relation between deforestation and food production pressures considering a host of parameters such demography, ethnicity, government policy, etc., using a reconstructed spatial-temporal data set. Thanh et al. describe a comprehensive web based landuse/landcover information system for basaltic soils in Central Highlands of Vietnam. Duong discusses an innovative approach for landuse mapping in mountainous terrains. Two papers described novel approaches to assess soil erosion and sediment yields at regional and global scale. Habib et al. report a process based distributed mathematical model to estimate erosion and route sediment yield while using fractals to scale point based equations to that of regional scale. Nam et al. apply RUSLE method to estimate global soil erosion using grided datasets and use calibration techniques to link between model and application domain scales. Herath et al. describe a coupled flood forecasting and inundation model and discuss the role of spatial information of different resolutions in the modeling process. A number of papers presented development of tools for geoinformatics applications and a few are selected for this issue. Duong presents a tool for analysis of remotely sensed data with in-built FORTRAN programming facilities. An online spatial analysis system for geologic modeling by integrating relational databases and GIS is described by Nemoto et al. The paper by Hung and Minh describe a software package for identifying and calculating the mineral assemblages. We are very happy to be involved in bringing out this special issue of JSGI on the GIS-IDEAS Symposium and are grateful to the Editorial Committee of JSGI for their support in bringing out this special issue. We thank the authors for working in a tight schedule and submitting the full papers adhering to the guidelines. It is our hope this special issue would serve the purpose, which is to disseminate information on geoinformatics research in the region and foster networking among and between researchers and practitioners.
日本情報地質学会の論文
2003-03-25

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