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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Geospatial Information System
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The Korean Society for Geospatial Information System
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Volume & Issues
Volume 9, Issue 2 - Dec 2001
Selecting the target year
A Pilot Project to Measure Propagated Error in Buffering Process
Yu, Ki-Yun ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 17~27
Buffering is one of the popular spatial analytical functions widely used in many proximity analyses. The buffeting inevitably entails a new polygon of specified edge that is simulated by rolling a ball around the buffering object. While buffering, the error on the buffering object propagates to the new buffered object. In this paper the error propagation behavior during the buffering operation is analyzed based on a pilot project for two different data models: polyline and spline curve. Thus, the error on the buffered objects are classified, mathematically defined, and measured. For measurements, the pilot project is designed and performed using a test site that is a lake boundary at Wisconsin, USA.
APPLYING ENTERPRISE GIS TO DISASTER MANAGEMENT AT KANGWON PROVINCE
Yoon, Hoon-Joo ; Ryu, Joong-Hi ; Kim, Jung-Dai ; Park, Hong-Gi ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 29~36
The purpose of this paper is to describe the Disaster Management System Development of Enterprise GIS at the Kangwon Province in Korea. This project is included into 'the Kangwon Enterprise GIS 21 plan'. The Division of Disaster Management is in the middle of the 2-year project of the Disaster Management System development, appropriate for business performed at the Departments of Forestry, Culture, Environment, Tourism, etc. At the 1st phase of CIS implementation, for more than half a year we focused on the necessity of management of disasters. In the planning process, we needed long-term information on the whole area of Kangwon. In the assessment and response processes, we needed real-time data from Korean Meteorological Administration and other agencies. All the above information was carefully studied and referred to. ESRI's new GIS technologies solve the natural hazard/disaster problems. For example, hazardous materials routing often needs to be found the least expensive path through a roadway network. In the circumstances given, we can choose the departure point and destination of the vehicle, which carries the materials. It's also possible to minimize overall risk and costs of disaster problems by making a plan of people and possessions evacuation from the disaster area in short time limits. We can meet all the above goals using the latest ESRI's technologies.
An Application of Spatial Classification Methods for the Improvement of Classification Accuracy
Jeong, Jae-Joon ; Lee, Byoung-Kil ; Kim, Hyung-Tae ; Kim, Yong-Il ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 37~46
Spectral pattern recognition techniques are most used in classification of remotely sensed data. Yet, in any real image, adjacent pixels are related, because imaging sensors acquire significant portions of energy from adjacent pixels. And, with the continued improvement in the spatial resolution of remote sensing systems, another spatial pattern recognition approach is must considered. In this study, we aim to show the potentiality of spatial classification methods through comparing the accuracies of spectral classification methods and those of spectral classification methods. By the comparisons between the two methods, classification accuracies of 6 different spatial classification methods are higher than that of spectral classification method by 2-6% or so. Additionally, we can show it statistically through the classification experiments with different band combinations.
A Study on the Accuracy Analysis of Numerical Cadastral Map by GPS-RTK
Lee, Dae-Woo ; Jung, Young-Dong ; Kang, Sang-Gu ; Choi, Han-Young ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 47~54
The aim of this study is to represent the effective method for undertaking cadastral surveying works through analyzing and comparison of the surveying results both Total Station and GPS surveying techniques. in the value of coordinate of land parcels, the surveying results of using Total Station and Real Time Kinematic GPS surveying are compared and anayzed. As a results, each axis X and Y differences are
. Therefore the latter surveying method is available to use for production of numerical casdastral map at a large scale and for field surveying in farmland adjustment area. Furthermore travers surveying is not needed to be done when horizontal position of the boundary of a land parcel is determined by the method of RTK. It is recognized as a effective and efficient method in rapaid, accurate and economical aspects.
TotalStation and System2000 Implementation for Digital Cartographic Map
Yang, Ok-Jin ; Jung, Young-Dong ; Kang, Sang-Gu ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 55~62
The development of electronic technology brings the advent of GPS and electronic total station which measures, stores and records automatically angles, distances and 3d coordinates Electronic totalstation is the surveying equipment and system2000 is the supporting program that enables totals tation to get 3d terrain information, construction of the database and automatic drafting of the cartographic map. In this study, we aims at studying the system which can produce automatically the digital cartographic map by using total station and system2000. For this study, cartographic maps of a region are produced by total station and system2000, and then builded digital cartographic map on the autocad2000 environment and also we analysed two digital cartographic maps. As a results of this study, it is found that digital cartographic map by total station and system2000 are much more accurate and efficient than cartographic map by electronic plan table surveying.
A Steps of Public Relations for the Conversion of Coordinates System in National Base Map
Park, Hong-Gi ;
Journal of Korean Society for Geospatial Information System, volume 9, issue 2, 2001, Pages 63~71
GPS allows a user with an appropriate receiver to obtain their position anywhere on the Earth's surface. The use of GPs has highlighted the shortcomings of national reference systems, and many countries are in the process of establishing new geodetic frameworks in order to overcome these shortcomings. Korea National Geography Institute has established a new geocentric datum and presented the its time frame for implementation. In this paper, I studied the considerable matters of digital mapping authority and users for converting the geodetic datum and coordinate system and suggested the steps of public relations for GIS users.