• Title/Summary/Keyword: Integrated navigation

Search Result 698, Processing Time 0.037 seconds

A Study on the Interactive Web 3D (인터랙티브(Interactive) 웹 3D 연구)

  • 오병근
    • Archives of design research
    • /
    • v.14 no.3
    • /
    • pp.117-125
    • /
    • 2001
  • The 2D based-web contents are limited to implement interactive elements for the users even though the contents are offered in various styles. Using the mouse and keyboards users chose any web contents for themselves beyond the limitation of time and space. They want more interactive style as they become familiar with convenience of web contents. The 3 dimensional web contents integrated with interactive technologies are one of the ways for them There are many researches and commercialization of the interactive web 30 for the past years because it has a lot of user benefits in terms of immersion, realistic expression, and interactivity. It has two types of implementation; one is for 3D polygon based objects, the other is for virtual worlds. This research is focus of on the concept of web interactive 3D, the technical aspects, design elements, and the proposal of navigation methods for the purpose of creating new type of web interactive contents.

  • PDF

A Study on the Applications of a Geographic Information Systems To A Transportation Planning Model (교통모형에서의 지리정보시스템 활용방안에 관한 연구)

  • Kim, Dae-Ho;Park, Jin-Woo
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.1 no.2 s.2
    • /
    • pp.167-175
    • /
    • 1993
  • This article contains three objectives. First it is to revise unnecessary procedures of a transportation models and transform results of a model into an image. Second objectives is to develop an operational structures which automatically input all data needed from arc-node topology to link-node topology of transportation network. By solving the network discrepancy, time and money for constructing to transportation can be saved. In addition, the rate of errors that my caused during data input process can be reduced. Conclusively, it is found that the integration package may provide user friendliness and reduce the rate of errors. The package can extract informations such as distance between zones and nodes, lane numbers, and hierarchy from arc-node topology for executing SDI. Another advantage of integration is the ability of spatial analysis. The integrated package may provide adequate arrangements of traffic facilities and checking systems of the shortest path. Finally, the database function of GIS package provides various information about study area for transportation analysis.

  • PDF

A Seamless Positioning System using GPS/INS/Barometer/Compass (GPS/INS/기압계/방위계를 이용한 연속 측위시스템)

  • Kwon, Jay-Hyoun;Grejner-Brzezinska, D.A.;Jwa, Yoon-Seok
    • Journal of Korean Society for Geospatial Information Science
    • /
    • v.14 no.3 s.37
    • /
    • pp.47-53
    • /
    • 2006
  • In this contribution, an integration of seamless navigation system for the pedestrian is introduced. To overcome the GPS outages in various situations, multi-sensor of GPS, INS, electronic barometer and compass are considered in one Extented Kalman filter. Especially, the integrated system is designed for low-cost for the practical applications. Therefore, a MEMS IMU is considered, and the low quality of the heading is compensated by the electronic compass. In addition, only the pseudoranges from GPS measurements are considered for possible real-time application so that the degraded height is also controlled by a barometer. The mathematical models for each sensor with systematic errors such as biases, scale factors are described in detail and the results are presented in terms of a covariance analysis as well as the position and attitude errors compared to the high-grade GPS/INS combined solutions. The real application scenario of GPS outage is also investigated to assess the feasible accuracy with respect to the outage period. The description on the current status of the development and future research directions are also stated.

  • PDF

A Study on the Building Information Integration Method between e-AIS and KLIS-rn (인터넷 건축행정정보시스템(e-AIS)과 도로명주소 관리시스템(KLIS-rn)의 연계 방법에 관한 연구)

  • Kim, Ji-Young;Kim, Ki-Rack;Lee, Won-Hee;Yu, Ki-Yun
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.9 no.1
    • /
    • pp.121-130
    • /
    • 2010
  • As the development of wireless environment and portable devices, navigation companies need more spatial information for Location Based Service and so they are investing heavily in this part. But my country have constructed lots of spatial dataset during the NGIS project, and then we can reduce costs by using constructed spatial dataset. The integration method of each building information between e-AIS and KLIS-rn is linked to designed mapping table by main building numbers and auxiliary cadastral number. e-AIS and KLIS-rn are integrated by the feature matching between CAD data and KLIS-rn. Due to the limitation of test data, more accuracy test will be required with various data sets.

Dynamic Modeling of Autonomous Underwater Vehicle for Underwater Surveillance and Parameter Tuning with Experiments (수중정찰용 자율무인잠수정의 운동 모델링 및 시험을 통한 계수 조정)

  • Lee, Phil-Yeop;Park, Sung-Kook;Kwon, Soon Tae;Park, Sangwoong;Jung, Hunsang;Park, Min-Soo;Lee, Pan-Mook
    • Journal of Ocean Engineering and Technology
    • /
    • v.29 no.6
    • /
    • pp.488-498
    • /
    • 2015
  • This paper presents the dynamic model of an AUV called HW200 for underwater surveillance. The mathematical model of HW200 is briefly introduced, considering its shape. The maneuvering coefficients were initially estimated using empirical formulas and a database of vehicles with similar shapes. A motion simulator, based on Simulink of Mathworks, was developed to evaluate the mathematical model of the vehicle and to tune the maneuvering coefficients. The parameters were finely tuned by comparing the experimental results and simulated responses generated with the simulator by applying the same control inputs as the experiment. The velocity of HW200 in the tuning process was fixed at a constant forward speed of 1.83 m/s. Simulations with variable speed commands were conducted, and the results showed good consistency in the motion response, attitude, and velocity of the vehicle, which were similar to those of the experiment even under the speed variation. This paper also discusses the feasibility of its application to a model-based integrated navigation system (INS) using the auxiliary information on the velocities generated by the model.

A Study on application of EMC to Digital Selective Calling VHF Transceiver for Maritime mobile service (해상이동업무용 디지털선택호출 VHF 송수신장치의 EMC 적용에 관한 연구)

  • 임종근;이동식;김기문
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2002.05a
    • /
    • pp.529-534
    • /
    • 2002
  • It was recommended for all ship engaged in international voyages to carry the dedicated Digital Selective Calling receiver, DSC equipment, VHF transceiver, etc according to Global Maritime Distress & Safety System. Also International Maritime Organization recommended for navigation and communication equipments to applicate the EMC regulations, therefore most of electronic equipments using in the vessel to be faced with problems to cope with new regulations. This study has applied and analyzed the EMC for an equipment integrated with Ch.70 dedicated DSC receiver, DSC equipment, VHF transceiver and groped for solutions to cope with. The test has applied the electromagnetic interference such as the measurement for unwanted emissions from conductive & radio emission and the electromagnetic susceptibility such as the immunity from voltage, frequency variation and electro static discharge, hence comes to be understand the problems related with the power and the earth.

  • PDF

A Study of Contents Arrangement in Conning Display (선박항법기기 화면의 배치에 관한 연구)

  • Yoon, Hoon-Yong;Kim, Kyung-Hoon
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.33 no.2
    • /
    • pp.154-161
    • /
    • 2010
  • The conning display which is located in the ship bridge shows the various important information such as ship position, ship speed, track data, rate of turn, thruster rpm so on, and is one of the IBSs(Integrated Bridge Systems). In this study, the survey was conducted for ten officers to find the importance and using frequency of the information which were displayed in the conning display. The results showed that the information of drift speed, ship speed, wind direction and wind force, rate of turn, sea water depth, ship position, heading, thrust rpm, alarm, rudder command and angle got high scores and it meant that these information were very important and high frequency of use during the navigation. The optimized contents arrangement in conning display was suggested based on importance and using frequency of information. The experiment using eye-tracking system was conducted to compare the performance time and error rate of nine different scenarios for suggested arrangement display and three other existing displays. The results showed that the suggested arrangement was the best in performance time and error rate. The scenario concerning the direction and speed of wind showed faster performance time and lower error rate than other scenarios. The movement of subject's eye tended to search from the center and to avoid the comer, called 'the comer effect.' It is expected that the results of this study could help for the bridge staff to grasp the sailing information easily and to cope with the given situations promptly.

Impact of Tropospheric Modeling Schemes into Accuracy of Estimated Ellipsoidal Heights by GPS Baseline Processing: Experimental Analysis and Results (GPS 기선해석에 의한 타원체고 추정에서 대류권 오차 보정기법이 정확도에 미치는 영향에 관한 실험적 분석)

  • Lee, Hungkyu
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.36 no.4
    • /
    • pp.245-254
    • /
    • 2018
  • Impact of tropospheric correction techniques on accuracy of the GPS (Global Positioning System) derived ellipsoidal heights has been experimentally assessed in this paper. To this end, 247 baselines were constructed from a total of 88 CORS (Continuously Operating Reference Stations) in Korea. The GPS measurements for seven days, acquired from the so-called integrated GNSS (Global Navigation Satellite Systems) data center via internet connection, have been processed by two baseline processing software packages with an application of the empirical models, such as Hopfield, modified Hopfield and Saastamoinen, and the estimation techniques based on the DD (Double-Differenced) measurements and the PPP (Precise Point Positioning) technique; hence a total number of the baseline processed and tested was 8,645. Accuracy and precision of the estimated heights from the various correction schemes were analyzed about baseline lengths and height differences of the testing baselines. Details of these results are summarized with a view to hopefully providing an overall guideline of a suitable selection of the modeling scheme with respect to processing conditions, such as the baseline length and the height differences.

Construction of Delay Predictive Models on Freeway Ramp Junctions (고속도로 진출입램프 접속부상의 지체예측모형 구축에 관한 연구)

  • 김정훈;김태곤
    • Journal of Korean Port Research
    • /
    • v.14 no.2
    • /
    • pp.175-185
    • /
    • 2000
  • Today freeway is experiencing a severe congestion with incoming or outgoing traffic through freeway ramps during the peak periods. Thus, the purpose of this study is to identify the traffic characteristics, analyze the relationships between the traffic characteristics and finally construct the delay predictive models on the rap junctions of freeway with 70mph speed limit. From the traffic analyses, and model construction and verification for delay prediction on the ramp junctions of freeway, the following results were obtained : ⅰ) Traffic flow showed a big difference depending on the time periods. Especially, more traffic flows were concentrated on the freeway junctions in the morning peak period. ⅱ) The occupancy also showed a big difference depending on the time periods, and the downstream occupancy(Od) was especially shown to have a higher explanatory power for the delay predictive model construction on the ramp junctions of freeway. ⅲ) The delay-occupancy curve showed a remarkable shift based on the occupancies observed : O$\_$d/〈9% and O$\_$d/$\geq$9%. Especially, volume and occupancy were shown to be highly explanatory for delay prediction on the ramp junctions of freeway under O$\_$d/$\geq$9%, but lowly for delay prediction on the ramp junctions of freeway under O$\_$d/〈9%. Rather, the driver characteristics or transportation conditions around the freeway were thought to be a little higher explanatory for the delay prediction under O$\_$d/〈9%. ⅳ) Integrated delay predictive models showed a higher explanatory power in the morning peak period, but a lower explanatory power in the non-peak periods.

  • PDF

Development of Evaluation Indicators for Web-based Agricultural Water Information System using Mandal-Art Method (만다라트(Mandal-Art) 기법을 이용한 웹기반 농업용수 정보시스템 평가지표 개발)

  • Kim, Solhee;Kim, Chanwoo;Jung, Chanhoon;Park, Jinseon;Kim, Jeongdae;Suh, Kyo
    • Journal of Korean Society of Rural Planning
    • /
    • v.23 no.4
    • /
    • pp.49-59
    • /
    • 2017
  • The importance of information system evaluation has increased according to ICT development and this evaluation is required for objective verification. The aim of this study is to develop evaluation indicators for web-based information system and verify the availability of these evaluation indicators through applying to agricultural water integrated information system. This study finds and provides eight evaluation items and 64 indicators for a web-based information system using $3{\times}3$ Mandal-Art matrix that is a tool for creating creative ideas. These evaluation items are design, contents, navigation, stability, community, convenience, usefulness, and accuracy. Total 64 evaluation indicators were presented by deriving eight evaluation items for each using $9{\times}9$ Mandal-Art matrix. When evaluating information system using evaluation indicators, it can be identified the vulnerable items in the information system. Also, the comprehensive results of the information system could be understood when appearing a single score after weighting. In addition, it can also help to prepare a questionnaire for evaluation systematically.