• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2004.04a
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• pp.413-418
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• 2004

The purpose of this research calculates the map manufacture cost and there are we even though we determine proper map price. We distinguished the budget item of NGI in 2003 with the direct cost to the overhead cost. A map manufacture cost classified a direct and overhead cost as a nap manufacture cost commonness cost and no relation cost and was calculated. The result to analyze the item of the charge, It is impossible to withdraw the map manufacture cost selling the map. This is because a map sale price inexpensive than the map manufacture price. We presented a two alternative in research to see consequently about a map price raising.

• Journal of Korean Society for Geospatial Information Science
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• v.13 no.1 s.31
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• pp.27-35
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• 2005

It is impossible to call in the cost of map-production from the supply cost because the map produced in NGI is the public property. The aims of this research are to calculate a map manufacture cost and to assess the reasonable map prices with considering public property of map. For these aims, We have calculated the cost according to the scale and the form of paper and digital map, have determined the map supply cost, and have analyzed the situation of map supply and the map circulation market. We propose two alternatives. Firstly, supply price of map is reached the goal price after 6-years(raising ratio 30%) and Secondly, supply price of map is reached the goal price after 3-years(raising ratio 50%) because map supply price raising ratio is very much if research results are reflected after 1-year.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.3
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• pp.65-70
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• 2009

To manage the urban land systematically, it is necessary to analyze the land price annually and correct the problems found by the annual land price analysis. The characteristics of the distribution of the land price and the grip of the central place using GIS can be used as the useful fundamental data for the urban planning and its management mechanism. In this study, the central place measurement, the distribution map and the isarithmic map is analyzed based on the individual notification land price and also its relationship with the central place is analyzed in case study area, Daejeon city.

• International conference on construction engineering and project management
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• 2015.10a
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• pp.77-81
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• 2015

The unit price contracting is the standard contracting method for highway projects in the U.S. As a result, state highway agencies have collected a large amount of historical bid data that they can use to determine engineer's estimates for future projects. The estimator must carefully consider various characteristics of a new project such as its location to determine an engineer's estimate as accurate as possible before bid letting. Higher cost estimates can result in the loss of the available budget and lower cost estimates may lead to deferral and delay of projects. The study uses the historical bid data obtained from Iowa Department of Transportation and develops a Geographic Information System (GIS) tool to visually show the variation of unit prices over the map using a spatial interpolation technique. The interpolation map can be used to estimate the unit price of the item at any location across Iowa. This noble method allows the estimator to effectively and fully utilize the historical bid data in a very time efficient manner and determine more accurate cost estimation.

• Journal of the Korean Geographical Society
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• v.38 no.6
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• pp.949-960
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• 2003

The marginal implicit price of air quality can be measured by taking a partial derivative of hedonic price function (HPF) with respect to the level of air quality. It has been pointed out that the size of the marginal implicit price varies with the use of different function forms, different estimation methods, and the different ways of measuring air quality level in estimating HPF. In addition to these factors, this study shows theoretically and empirically the way housing properties are represented on a digital map could differentiate the size of marginal implicit price of air quality when GIS is used to measure location attributes of the housing properties in the Korean apartment market. Furthermore, this study shows that the degree of difference in the marginal implicit price due to the manner in which housing properties are represented on a digital map can be larger than the degree of difference in the marginal implicit price due to using different function forms and estimation methods. The major implication from the results of this study is that one should carefully try diverse ways of representing housing properties in the Korean apartment market on a digital map in the process of estimating HPF, as he or she usually tries diverse function forms and estimation methods, to see if the value of the marginal implicit price of air quality varies substantially.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.67 no.4
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• pp.183-190
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• 2018

Predicting accurate electricity prices is an important task in the electricity trading market. To address the electricity price forecasting problem, various approaches have been proposed so far and it is known that linear regression-based approaches are the best. However, the use of such linear regression-based methods is limited due to low accuracy and performance. In traditional linear regression methods, it is not practical to find a nonlinear regression model that explains the training data well. If the training data is complex (i.e., small-sized individual data and large-sized features), it is difficult to find the polynomial function with n terms as the model that fits to the training data. On the other hand, as a linear regression model approximating a nonlinear regression model is used, the accuracy of the model drops considerably because it does not accurately reflect the characteristics of the training data. To cope with this problem, we propose a new electricity price forecasting method that divides the entire dataset to multiple split datasets and find the best linear regression models, each of which is the optimal model in each dataset. Meanwhile, to improve the performance of the proposed method, we modify the proposed localized linear regression method in the map and reduce way that is a framework for parallel processing data stored in a Hadoop distributed file system. Our experimental results show that the proposed model outperforms the existing linear regression model. Specifically, the accuracy of the proposed method is improved by 45% and the performance is faster 5 times than the existing linear regression-based model.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.25 no.6_2
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• pp.653-663
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• 2007

The purpose of this study is to suggest concrete approaches of copyright application among various map price policies to establish the system of a digital map market, to revitalize its market, and to give the public better map services. To do this, we analyzed copyright law in Korea and the copyright protection of digital map in foreign countries firstly, investigated the applicability of copyright to the map market in Korea, analyzed the effect on this market, and suggested an direction of the revision for the Surveying law and the National Geographic Information (NGlS) law lastly. We drew several conclusions. Firstly, the protection of the rights of database makers is the best approach to protect digital maps in korea. Secondly, we need to adopt copyright to the Surveying law and the National Geographic Information Systems (NGlS) law. Lastly, establishing a copyright trust organization to improve the quality of digital maps and to manage various affairs is needed.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.2
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• pp.3-9
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• 2009

These days, the value of the limited land rises in the city according to the increase of the population and the industrial development. And various studies on estimating the land price have been accomplished for the purpose of using the land efficiently. As a result, the officially assessed land price system was arranged. However the system is insufficient to reflect realities. Therefore, in this study, we examined the spatial distribution of the land price by joining spatially the officially assessed land price of Haeundae-gu, Busan from 2004 to 2008 to the map of lot number. We also computed and compared the change rate of the land price for 5 years. And we analyzed the relation between factors including the distance from the subway station, the land use and the land category which have an effect on the officially assessed land price and it using GIS technology.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.205-206
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• 2021

본 논문에서는 스마트 폰의 GPS 센서와 Google Map, 공공데이터를 활용해 사용자 주변의 최저가 업소를 맵에 표기하는 애플리케이션을 개발한다. 이 애플리케이션은 휴대폰 인증을 통한 회원가입 기능을 구현하였으며 안드로이드 GPS 센서를 이용하여 현재 사용자의 위치 주변의 최저가 업소들을 표기한다. 또한 사용자가 검색하고자 하는 업소의 업종을 선택하면 맵에 선택한 업종과 같은 업소들의 위치에 마커를 표시하고 마커를 클릭 시 업소명, 대표메뉴, 가격 등의 정보를 볼 수 있다.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.724-728
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• 2005

This paper represents a development of a range finder sensor module for indoor 2-D mapping and modified Hough transformation for map building. A range finder sensor module has been developed by using optic PSD (Position Sensitive Detector) sensor array at a low price. While PSD sensor is cost effective and light weighting, it has switching noise and white noise. To remove these noises, we propose a heuristic filter. For line-based map building, also we proposed advanced Hough transformation and navigation algorithm. Some experiments were illustrated for the validity of the developed system.