• Proceedings of the KSRS Conference
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• 2008.10a
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• pp.45-48
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• 2008

Since the mid-2000, so-called Web 2.0 paradigm was emerged and has been widely extended to actual Web markets with supporting Web technologies. Among Web 2.0 services, mashups with Open APIs is regarded as one of core technologies. Web mapping is also the most dominant mashup application in Open API-based applications, so that various mashups with Google Map API and other Open APIs are developing. In this paper, current technological status is explained with web GIS file formats of KML. While, a prototype is web-based GIS layer authoring system for general users, without any kinds of GIS tools and external spatial databases. This mashup application will be used web-based feature extraction for geo-spatial web for public users.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.89-90
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• 2020

본 논문에서는 안드로이드 위치 센서를 기반으로 경기도 긴급재난지원금의 사용처에 대한 정보를 사용자들에게 제공하는 '가치살림' 애플리케이션을 설계하고 구현한다. 이 애플리케이션은 간소화 된 회원가입과 시간과 장소에 구애받지 않는 스마트폰 애플리케이션을 제공하여 접근성이 높인다. 또한 남녀노소 편리한 사용을 위하여 단순한 화면구현과 사용처 위치, 길 안내, 사용처 정보 제공, 내 위치 등의 필수 정보를 제공한다. 사용자는 즐겨 찾는 지역 또는 본인의 거주 지역, 현재 위치를 기반으로 긴급재난지원금 사용처의 정보를 알 수 있다. 경기도 각 시군의 지역화폐 가맹점 현황 정보는 경기도 데이터 드림의 지역화폐 가맹점 현황 Open API를 통해 가져온다. 또한, 긴급 재난 지원금의 사용처의 위치 정보와 사용자의 위치는 경기도 데이터 드림의 지역화폐 가맹점 현황 Open API에서 각 사용처별 위도와 경도 값과 Google Map을 통해 구현한다.

• Spatial Information Research
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• v.18 no.1
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• pp.89-99
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• 2010

This study has been implemented a map-based festival information website with Google Map to overcome a limit that existing festival information web sites supplied location information only through text-based format. To get the newest festival information, this website uses GeoRSS function which transform rss feed offered by newspaper websites into location based information. Through this function, internet users can see festival information at a glance on the basis of a map. Through this study we confirmed the efficiency of offering location based festival information and possibility of GeoRSS function to provide the newest festival information.

• Spatial Information Research
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• v.18 no.2
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• pp.13-24
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• 2010

The purpose of this research is to explore the possibility of geographic education by implementing the map-based geographic education site which mashed up with Google earth by referring the various materials of geographic education which exist in on-line and off-line. In recent years map-based geographic education is required by the radical change of geoweb environments, but there have been few researches in this field. This research is folded up as follows: First, we designed the contents through the textbook analysis and then collect various data related to the contents such as pictures, video clips, conceptual map, etc. which are required to explain the concept. Second, we mashed up the collected data on the Google earth by using the Google's open API. Third, we implemented the geographic education website based on the classification of contents in textbook and the various collected data. This research is important in both that it explores the possibility of the map-based education rather than the text-based education in the geographic field which handles mainly the space and finds the best method to express the various concepts of the textbook on the geoweb environments.

• Journal of the Semiconductor & Display Technology
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• v.21 no.1
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• pp.136-141
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• 2022

In this paper, we designed, implemented, and verified the SLAM system that can be used on mobile devices. Mobile SLAM is composed of a stand-alone type that directly performs SLAM operation on a mobile device, and a mapping server type that additionally configures a mapping server based on FastAPI to perform SLAM operation on the server and transmits data for map visualization to a mobile device. The mobile SLAM system proposed in this paper is to mix the two types in order to make SLAM operation and map generation more efficient. The stand-alone type SLAM system was configured as an Android app by porting the OpenVSLAM library to the Unity engine, and the map generation and performance were evaluated on desktop PCs and mobile devices. The mobile SLAM system in this paper is an open source project, so it is expected to help develop AR contents based on SLAM in a mobile environment.

• Journal of the Korea Society of Computer and Information
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• v.15 no.10
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• pp.79-86
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• 2010

This paper presents implementation of a system for effective visualizing flight information of aircraft using Google Earth. This system in order to use a detailed satellite image which provide from Google Earth used COM API. This system appeared the various flight information of the aircraft in the instrument panel using OpenGL and the aircraft flight condition is visible in the Google Earth Map. This research result used to flight evaluation and improvement. In future will be able to apply to flight software development.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.207-208
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• 2021

본 논문에서는 스마트 폰의 가속도(Accelerometer) 센서와 GPS 센서 및 Kakao Map, Kakao OPEN API 기반을 이용하여 아동, 기저질환자 및 노약자 등의 사용자들이 위험한 상황에 노출되었을 때 자동으로 구조 요청 서비스를 제공하는 낙상 감지 애플리케이션을 설계하고 구현한다. 이 애플리케이션은 사용자의 낙상, 넘어짐 등을 감지하여 보호자에게 SMS 및 카카오톡으로 구조 요청 메시지를 자동으로 전송한다. 안드로이드의 가속도 센서는 사용자의 가속도 및 각도를 계산하여 낙상 및 넘어짐을 감지하고, GPS 센서를 통해 사용자의 현재 위치를 카카오 맵에 표시하고, 구조 요청 메시지를 자동으로 전송함으로써 사용자가 긴급한 상황에서 구출되도록 한다.

• Journal of Cadastre & Land InformatiX
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• v.46 no.2
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• pp.183-196
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• 2016

Ground control points are needed for precision geometric correction of satellite images, and the coordinates of a high-quality ground control point can be obtained from the GPS measurement. However, considering the GPS measurement requires an excessive amount o f t ime a nd e fforts, there is a need for coming up with an alternative solution to replace it. Therefore, we examined the possibility of replacing the existing GPS measurement with coordinates available at online maps to acquire the coordinates of ground control points. To this end, we examined error amounts between the coordinates of ground control points obtained through Daum Map API, and them compared the accuracies between three types of coordinate transformation equations which were used for geometric correction of satellite images. In addition, we used the coordinate transformation equation with the highest accuracy, the coordinates of ground control point obtained through the GPS measurement and those acquired through D aum M ap A PI, and conducted geometric correction on them to compare their accuracy and evaluate their effectiveness. According to the results, the 3rd order polynomial transformation equation showed the highest accuracy among three types of coordinates transformation equations. In the case of using mid-resolution satellite images such as those taken by Landsat-8, it seems that it is possible to use geometrically corrected images that have been obtained after acquiring the coordinates of ground control points through Daum Map API.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.6
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• pp.651-656
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• 2010

In the homepage of 16 municipal provincial office of education, school information service displays text-based results through search step or presents the simple information of the selected area when an area is clicked on the static image map. And it has several problems such as server load and slow transfer speed by the search of the synchronous transfer. Thus, in this study, we used the open API of Google map to provide location-based school information and implemented the mash up service for school information with the Ajax program of asynchronous transfer to reduce server load and to increase transmission speed. This service gives the efficiency and convenience to students, teachers, parents and education family members of various levels because it includes the location with school information on a dynamic map.

• Spatial Information Research
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• v.20 no.2
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• pp.35-44
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• 2012

Recently, Web map service is actively accomplished in both private companies and public offices. As a platform, it exists variously from desktop to smartphone. The technology being used has a trend to develop continuously. Also, Web map system provides various open API for people who use geospatial service and data mashup. In this paper, RIA technology which is popularly used recently in web map service w ill be applied to introduce the functions different language map services are mostly using. Based on users' feeling about different web browser's speed, test and analysis have been accomplished. The result is that there are different characteristics according to different functions such as JavaScript, Silverlight, Flex. Actual test has been personally carried out on map service in Seoul GIS portal system. The comprehensive conclusion is that Silverlight has more outstanding function compared with other RIA techniques under the test environment.