• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2003.04a
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• pp.285-290
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• 2003

This study is aimed at standardizing the process of spatial database construction and developing a software tool for process management. Knowhow of five GIS firms and provisions of NGI(National Geography Institute) were analyzed. In this study, the process of spatial database construction was standardize. The system from this study has the capability to manage the process of construction database using GIS and to deal with the metadata of unit map, generated from the process, systematically and continuously The process was also shown by using either Gantt chart or PERT chart after developing an interface for "MS Project". A software "Visual Basic for Application" was used for this study.

• Spatial Information Research
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• v.12 no.1
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• pp.1-12
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• 2004

The 3-dimensional GIS data provider system manages and retrieves 2, 3-dimensional spatial and time data. This system provides the standard interfaces which help developers to omit additional works to do modify or convert a format of 2 or 3-dimensional spatial data, which has been already accumulated, into that dependent on a specified system. This system consists of a data provider and data access component. The former deals with the connections with some databases and manages the meta data, so that the various GIS or software can access to 3-dimensional spatial and time data via the same method, and the latter takes charge of index management and spatial operations on GIS data for consumers. The system offers the diverse spatial operations and analysis functions for 3-dimensional GIS.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2006.04a
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• pp.333-337
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• 2006

As IT-based technologies develop, 3D GIS applications that digitally model real environment are being increased. Although the terms related with 3D CIS are used increasingly, research efforts and applications are mostly limited to only 2D GIS or 3D modeling respectively. The reasons are viewed that there have been less research findings or software tools about integration of 2D GIS and 3B models. Thus, this study presents a method to integrate 2D GIS and 3D models by using database as the means for linkage. To illustrate the process, we developed a prototype application using C# language. Within an interface we showed how to integrate different libraries - EON Studio and MapObjects. We expect that the integration techniques we suggest here can be applied to such areas as disaster prevention, transportation and natural resources management.

• Journal of Fisheries and Marine Sciences Education
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• v.17 no.1
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• pp.76-85
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• 2005

GIS (Geographic Information Systems) technology is a necessary function to support location based on service by using GPS in the mobile environment. These mobile systems have basic functional limitations such as a low rate of processing, limited memory capacity, and small screen size. Because of these limitations, most of the mobile systems require development of a reduced digital map to overcome problems with large-volume spatial data. In this paper, we suggest using the reduced digital map format in order to use location based on service in a PDA environment. The processing of the proposed data format consists of map generation, redefinition of layers, creating polygons, and format conversion. The proposed data format reduces the data size by about 98% comparing with DXF format based on the digital map of Busan.

• Journal of Korean Society of Forest Science
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• v.99 no.2
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• pp.197-203
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• 2010

The data of average temperature, average relative humidity, precipitation and average wind speed were collected from 674 meteorological stations in China. A specific procedure that processes original data into a new data format needed in forest fire danger rating forecast system of China was introduced systematically, and the feasibility of this method was validated in this paper. In addition, a set of meteorological data processing software was constructed by the secondary development of GIS in order to realize automation of processing data for the system. Results showed that the approach preformed well in handling temperature, average relative humidity and average wind speed, and the processing effect of precipitation was acceptable. Moreover, the automated procedure could be achieved by GIS and the working efficiency was about 3 times as much as that of manual handling. The informationization level of processing meteorological data was greatly enhanced.

• 한국지구물리탐사학회:학술대회논문집
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• 2003.11a
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• pp.553-556
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• 2003

The objective of this study is to implement geological functions on the Internet such as the visualization, search and analysis of geological data. To improve their performance and reduce the cost during development, special concerns should be given to the dynamic integration and interoperability of them. XML Web Service technologies can be adopted and OpenGIS specifications should be considered for the integration of distributed GIS components and their interoperability. Because standard Internet protocols and XML Messages are used in the Web Service, it makes the integration among different hardware and software systems possible. OpenGIS specifications also enable users to get benefits from geographic information and services across any network, platform and application. A prototype of efficient Internet GIS applications has been suggested in this study.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.81-84
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• 2001

3 차원 GIS 소프트웨어를 개발하기 위한 기술로는 공간데이터처리 및 공간분석기술, 컴퓨터그래픽스 및 가상현실 기술에 이르기까지 다양한 연구가 요구된다. 지리정보 가시화(Visualization)에 관한 연구는 여러 GIS 응용분야에서 주요한 부분이 된다. 현재 2 차원 기 구축된 데이터를 이용하여 3차원으로 가시화 및 분석을 수행할 수 있다는 것은 데이터와 소프트웨어 재사용 및 비용측면에서 중요한 의미를 가진다. 본 논문에서는 2차원 데이터와 최소한의 3차원 부가정보(빌딩높이, 도로폭등)를 이용하여 규칙기반 모델링(Rule-Based Modeling)을 통해 3 차원으로 모델링 해 낼 수 있는 3 차원 장면 모델러 컴포넌트 설계 방법을 제안한다. 시설물의 다양한 상세도 제어가 가능한 LOD(level-of detail) 모델러와 3 차원 장면을 효율적으로 관리하기 위한 장면 그래프(scene graph) 컴포넌트 설계 기술을 소개한다. 장면 모델러 컴포넌트 분석을 위해 처리하는 입력 데이터, 수작업 3 차원 모델링 여부, 소프트웨어 재사용성, 상호운용성, 구축 비용 등을 기준으로 분석하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.5
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• pp.3213-3219
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• 2014

Currently, increase of greenhouse gas has had a signigicant impact on climate change in urbanization. As a result, the government has been looking for ways to take advantage of the trees that generate oxygen and reduce carbon dioxide for the prevention of climate change. It is essential to extract individual tree for calculating the amount of carbon dioxide reduction of trees. Aerial LIDAR data have three-dimensional information of building as well as trees as form of point clouds. In this study, automated model was developed to extract individual tree using aerial LIDAR data. For this purpose, we established a methodology for extracting trees and then proceeded the process of developing it as an automated model based on model builder of ArcGIS Software. In order to evaluate the applicability of the developed model, the model was compared with commercial software in study area located in Yongin City. Through the experimental result, the proposed model was extract trees 9.91% higher than commercial software. From this results, it was found that the model effectively extracted trees.

• Proceedings of the KSRS Conference
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• v.2
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• pp.570-573
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• 2006

College GIS and remote sensing education usually consists of commercial software packages implementations in the classroom. Computer programming is quite important when college graduates work in private or public sectors relevant with GIS and remote sensing implementations. The objective of this paper was to develop a valley management system which implements GIS and remote sensing as the key components for education. The Valley Authority is entitled with water resource protection for sustainable drinking water supply of the second largest city in Taiwan. The test area consists of three different government agencies, Forest Service, EPA, and Water Resource Agency. Materials were provided by the Valley Authority in ArcGIS file format. MapObjects have made the GIS development process much easier. Remote sensing with image manipulation functions were provided by computer programming with Visual Baisc.NET and Visual C#.NET. Attributes inquiry are performed by these two computer languages as well. ArcGIS and ArcPad are also used for simple GIS manipulations of the test area. Comparison between DIY and commercial GIS can be made by college students. Functions provided by the developed valley management system depending on how many map layers have been used and what types of MapObjects components have been used. Computer programming experience is not essential but can be helpful for a college student. The whole process is a step-by-step sequence which college students can modify to depict their capability in GIS and remote sensing. The development process has gone through one semester, three hours every week in 18 weeks. College students enrolled in this class entitled with GIS showed remarkable progresses both in GIS and remote sensing.

• Journal of Korea Spatial Information System Society
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• v.2 no.1 s.3
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• pp.43-55
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• 2000

Because the complexity in the development phase of geographic information system, its hard to change its operation or user interface after the development. So we should develop most part of the applied GIS even though previous GIS is almost exist. In other words, reusing the previous system is not easy. Therefore, its required to research reusable GIS for easy construction of applied GIS. This thesis describes design and implementation of web GIS framework which makes applied web GIS development more easy. Framework is software library composed of reusable units such like classes and objects. Proposed web GIS framework Provides basic web GIS functionalities and execution design to web GIS developers. They could extend the framework to build applied web GIS with applied operation and user interface. The development of applied web GIS could be archived by various tools used for general web application development.