• 정보처리학회논문지D
• /
• 제19D권3호
• /
• pp.229-236
• /
• 2012

웹과 스마트폰의 사용이 일상화 되면서 맵 응용에 대한 수요가 웹 및 모바일 환경에서 급증하고 있다. 웹 기반 맵 응용들은 대부분 ArcGIS와 같은 값비싼 개발 환경이나 MapServer와 같은 공개 개발 환경에서 작성되고 있고 모바일 맵 응용들은 Google Maps나 Yahoo Maps와 같은 API 수준에서 작성되고 있다. 그러나 이러한 개발 환경들은 자동화 지원 정도가 미약하여 맵 응용 개발의 많은 부분이 아직 수작업에 의존하고 있다. 우리가 설계하고 구현한 MapAppGen은 신속한 웹 기반 맵 응용의 작성을 지원하기 위해 Drupal CMS(Contents Management System)에 적용 가능한 맵 관련 모듈들을 생성해 줌으로써 맵 응용에 대한 생산성을 향상시켜 준다. MapAppGen으로 생성한 응용은 Drupal이 지원하는 기존의 GMap이나 NodeMap이 생성한 응용에 비해 관심의 대상인 지형/지물과 함께 이 지형/지물과 연관된 모든 정보를 검색해 표시한다. MapAppGen은 Google Maps API를 사용하며 Drupal은 컨텐츠의 생성, 구성, 관리를 지원하는 모듈 기반 시스템이다. 향후, MapAppGen을 확장하여 모바일 맵 응용의 자동 생성도 지원할 예정이다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.850-853
• /
• 2002

This paper described some applications using Open GIS Component that was called MapBase. There were 4 applications : KSDI(Korea Spatial Data Infrastructure) funded by MOIC(Ministry of Information and Communication), National Plants Resource Management System supported by Korea Forest Service, 7-Underground Facilities Management System of Cheongju funded by MOCT(Ministry of Construction and Transportation), and National Disaster Management System supported by MOGAHA(Ministry of Government Administration and Home Affairs. Because they wanted to access heterogeneous spatial database, it was necessary to select MapBase as their base methodology. The main feature of MapBase was component S/W which provided the interoperability and reusability among GIS applications as well as non-GIS information system through common specification. In this paper, we showed some applications' architectures and functions to increase understanding MapBase. That would help you to make application using MapBase.

• Journal of Information Processing Systems
• /
• 제13권1호
• /
• pp.68-82
• /
• 2017

Nowadays, geographic information system (GIS) is developed and implemented in many areas. A huge volume of vector map data has been accessed unlawfully by hackers, pirates, or unauthorized users. For this reason, we need the methods that help to protect GIS data for storage, multimedia applications, and transmission. In our paper, a selective encryption method is presented based on vertex randomization and hybrid transform in the GIS vector map. In the proposed algorithm, polylines and polygons are focused as the targets for encryption. Objects are classified in each layer, and all coordinates of the significant objects are encrypted by the key sets generated by using chaotic map before changing them in DWT, DFT domain. Experimental results verify the high efficiency visualization by low complexity, high security performance by random processes.

• 한국공간정보시스템학회 논문지
• /
• 제7권3호
• /
• pp.93-106
• /
• 2005

최근 웹을 통해 지리정보를 공유하기 위해서 표준 인터페이스를 가지는 웹 맵 서비스(WMS, Web Map Service)가 개발되고 있다. 특히, OGC(Open Geospatial Consortium)에서는 웹 맵 서비스를 위한 개방형 인터페이스 명세를 발표하고, ISO 표준으로 채택되기 위한 절차를 진행하는 등 가장 활발한 활동을 보이고 있다. 그러나 현재 OGC에서 정의하고 있는 WMS 명세는 모바일 환경에서의 응용 프로그램 작성에 몇 가지 문제점을 가지고 있다. 유선 인터넷 환경과 달리 모바일 환경에서의 응용에서 맵 서버는 클라이언트로 전송되는 데이터의 크기를 최소화할 필요가 있다. 왜냐하면, 데이터의 크기는 전송 비용뿐 아니라, 맵 클라이언트의 응답시간에 매우 중요한 요소이기 때문이다. 또한 모바일 응용에서는 모바일 디바이스의 화면 필기에 따라서 적절한 품질의 맵을 제공해야하며, 응용 분야에 특화된 질의를 지원할 필요가 있다. 이 논문에서는 OGC에서 제안한 표준 인터페이스를 수용하면서, 모바일 응용을 위한 요구조건을 반영하기 위해서 모바일 웹 맵 서비스(Mobile Web Map Service, M-WMS)를 위한 인터페이스를 제안한다. 또한 모바일 맵 서비스를 지원하기 위한 맵 서버를 설계하고, 구현하였다. 이 논문은 현재 관심이 집중되고 있는 LBS, 텔레매틱스 등 다양한 모바일 응용에서 적용 가능한 웹 맵 서버를 생성하고 사용하는데 기여하고 있다.

• Nonlinear Functional Analysis and Applications
• /
• 제26권1호
• /
• pp.93-104
• /
• 2021

In this paper, we present a fixed point theorem for a family of generalized condensing multimaps which have ranges of the Zima-Hadžić type in Hausdorff KKM uniform spaces. It extends Himmelberg et al. type fixed point theorem. As applications, we obtain some new collective fixed point theorems for various type generalized condensing multimaps in abstract convex uniform spaces.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
• /
• pp.221-225
• /
• 1987

In this paper, the performance of Mini MAP architecture in realtime application is analyzed by analytic methods. The approximate equations for token rotation time and waiting time are obtained and using these equations network. performance is evaluated. According to the results obtained, Mini MAP architecture has good realtime performance and can be used to many real time applications.

• 대한수학회논문집
• /
• 제37권2호
• /
• pp.607-629
• /
• 2022

In this paper, we give the necessary and sufficient condition for the conformal mapping ϕ : (ℝⁿ, g₀) → (Nⁿ, h) (n ≥ 3) to be triharmonic where we prove that the gradient of its dilation is a solution of a fourth-order elliptic partial differential equation. We construct some examples of triharmonic maps which are not biharmonic and we calculate the trace of the stress-energy tensor associated with the triharmonic maps.

• 한국멀티미디어학회논문지
• /
• 제19권8호
• /
• pp.1453-1459
• /
• 2016

Recently, vector map has developed, used in many domains, and in most cases vector map data contains confidential information which must be kept away from unauthorized users. Moreover, the manufacturing process of a vector map is complex and the maintenance of a digital map requires substantial monetary and human resources. This paper presents the selective encryption scheme based on polyline simplification methods for GIS vector map data protection to store, transmit or distribute to authorized users. Main advantages of our algorithm are random vertices and transformation processes but it still meets requirements of security by random processes, and this algorithm can be implement to many types of vector map formats.

• International Journal of Computer Science & Network Security
• /
• 제22권11호
• /
• pp.373-380
• /
• 2022

The field of land surveying is changing dramatically due to the way data is processed, analyzed and presented. Also, there is a growing demand for digital spatial information, coming primarily from the GIS (Geographical Information System) user community. Such a demand has created a strong development potential for a new land surveying software. An overview of the development and capabilities of a land surveying software platform based on the Windows system, SurveyingMap, is presented. Among its many features, SurveyingMap provides a lot of adaptability for networks adjustment, geodetic and plane coordinates transformation, contouring, sectioning, DTM (Digital Terrain Model) generation, and large scale mapping applications. The system output is compatible with well known computer aided drafting (CAD) /GIS packages to expand its scope of applications. SurveyingMap is also suitable for non-technical users due to the user-friendly graphic user interface. The system could be used in engineering, architecture, GIS, and academic teaching and research, among other fields. Two applications of SurveyingMap, extension of field control and large scale mapping, for the case study area are established. The results demonstrate that the system is adaptable and reasonably priced for use by college and university students.

• 한국멀티미디어학회논문지
• /
• 제17권7호
• /
• pp.769-777
• /
• 2014

With the rapid interest in Geographic Information System (GIS) contents, a large volume of valuable GIS dataset has been distributed illegally by pirates, hackers, or unauthorized users. Therefore the problem focus on how to protect the copyright of GIS vector map data for storage and transmission. At this point, GIS security techniques focusing on secure network and data encryption have been studied and developed to solve the copyright protection and illegal copy prevention for GIS digital map. But GIS vector map data is very large and current data encryption techniques often encrypt all components of data. That means we have encrypted large amount of data lead to the long encrypting time and high complexity computation. This paper presents a novel selective encryption scheme for GIS vector map data protection to store, transmit or distribute to authorized users using K-means algorithm. The proposed algorithm only encrypts a small part of data based on properties of polylines and polygons in GIS vector map but it can change whole data of GIS vector map. Experimental results verified the proposed algorithm effectively and error in decryption is approximately zero.