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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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Journal DOI :
Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography
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Volume & Issues
Volume 29, Issue 6 - Dec 2011
Volume 29, Issue 5 - Oct 2011
Volume 29, Issue 4 - Aug 2011
Volume 29, Issue 3 - Jun 2011
Volume 29, Issue 2 - Apr 2011
Volume 29, Issue 1 - Feb 2011
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A Study on the PRC Generation Algorithms for Virtual Reference Stations Using a Network of DGNSS Reference Stations
Kim, Hye-In ; Park, Kwan-Dong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 221~228
DOI : 10.7848/ksgpc.2011.29.3.221
For service-area-widening and commercialization of DGNSS service, Ministry of Land, Transport and Maritime Affairs is developing a DGNSS service based on VRS using T-DMB. In this study, three PRC generation algorithms are developed for VRS DGNSS and their accuracies were evaluated. Three DGNSS correction generation algorithms are based on inverse distance weighting, 1st- and 2nd- multiple linear regression, and their positioning accuracies were compared in terms of the number of reference stations used for network composition and the algorithm type. As a result, the positioning accuracy of the case of using 16 sites is better than that of 6 sites. And the algorithm using the multiple linear regression showed the best performance. When the positioning accuracy of VRS DGNSS was compared with the traditional single-reference DGNSS, the improvement ratio was 20-23% and 20-36% for the horizontal and vertical directions, respectively.
Noise Mapping of Residential Areas by Estimating Urban Traffic Noise
Eo, Jae-Hoon ; Yoo, Hwan-Hee ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 229~235
DOI : 10.7848/ksgpc.2011.29.3.229
Traffic noise pollution is a growing problem that highly affects the health of people in urban areas. In order to implement effective measures against traffic noise the noise mapping about its distribution is imperative. Urban traffic noise maps will help to establish the existing baseline so that we will be able to look for the effective way to control the noise. They will also let us see in an understandable and visual way how noise spreads from roads into residential areas. In this paper we considered three development types between roads and residential areas, and applied the interpolation of ArcGIS for noise attenuation with distance from the roads to find the noise level at the parcels positions in residential areas, and then generated the noise map using the interpolated results. Therefore we present results that the traffic noise level within residential areas exceed the national noise standard and also can estimate the noise level of individual parcels. These results can be used for traffic noise control planning or assessment of officially assessed land price in near future.
Improvement of GPS Relative Positioning Accuracy by Using Crustal Deformation Model in the Korean Peninsula
Cho, Jae-Myoung ; Yun, Hong-Sik ; Lee, Mi-Ran ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 237~247
DOI : 10.7848/ksgpc.2011.29.3.237
As of 2011, 72 Permanent GPS Stations are installed to control DGPS reference points by the National Geographic Information Institute in South Korea. As the center of the Earth`s mass continues to move, the coordinates of the permanent GPS stations become inconsistent over time. Thus, a reference frame using a set of coordinates and their velocities of a global network of stations at a specific period has been used to solve the inconsistency. However, the relative movement of the permanent GPS stations can lower the accuracy of GPS relative positioning. In this research, we first analyzed the data collected daily during the past 30 months at the 40 permanent GPS stations within South Korea and the 5 IGS permanent GPS stations around the Korean Peninsula using a global network adjustment. We then calculated the absolute and relative amount of movement of the GPS permanent stations. We also identified the optimum renewal period of the permanent GPS stations considering the accuracy of relative GPS surveying. Finally, we developed a Korean a Korean crustal movement model that can be used to improvement of accuracy.
Geocoding of the Free Stereo Mosaic Image Generated from Video Sequences
Noh, Myoung-Jong ; Cho, Woo-Sug ; Park, Jun-Ku ; Kim, Jung-Sub ; Koh, Jin-Woo ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 249~255
DOI : 10.7848/ksgpc.2011.29.3.249
The free-stereo mosaics image without GPS/INS and ground control data can be generated by using relative orientation parameters on the 3D model coordinate system. Its origin is located in one reference frame image. A 3D coordinate calculated by conjugate points on the free-stereo mosaic images is represented on the 3D model coordinate system. For determining 3D coordinate on the 3D absolute coordinate system utilizing conjugate points on the free-stereo mosaic images, transformation methodology is required for transforming 3D model coordinate into 3D absolute coordinate. Generally, the 3D similarity transformation is used for transforming each other 3D coordinates. Error of 3D model coordinates used in the free-stereo mosaic images is non-linearly increased according to distance from 3D model coordinate and origin point. For this reason, 3D model coordinates used in the free-stereo mosaic images are difficult to transform into 3D absolute coordinates by using linear transformation. Therefore, methodology for transforming nonlinear 3D model coordinate into 3D absolute coordinate is needed. Also methodology for resampling the free-stereo mosaic image to the geo-stereo mosaic image is needed for overlapping digital map on absolute coordinate and stereo mosaic images. In this paper, we propose a 3D non-linear transformation for converting 3D model coordinate in the free-stereo mosaic image to 3D absolute coordinate, and a 2D non-linear transformation based on 3D non-linear transformation converting the free-stereo mosaic image to the geo-stereo mosaic image.
Comparative study for height accuracy of Full waveform LiDAR data
Ryu, Joong-Hi ; Lee, Jae-Hwan ; Koh, Seung-Bum ; Kim, Back-Seok ; Seo, Hae-Soo ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 257~263
DOI : 10.7848/ksgpc.2011.29.3.257
There are many previous researches such as verification of accuracy, application, and change detection of discrete return LiDAR data, but no researches for full waveform LiDAR data. In this study, we selected the forest area and urban area as case study areas and compared the height accuracy of full waveform LiDAR data with field surveying data. As a result, we got an RMSE of 3.lcm in urban area, 4.7cm in forest area, and it is verified that height accuracy of full waveform LiDAR is high. We think that it is very usefull in aerial photogrammetry.
A Suitability Analysis of the Factory Development Location using the Green Development Suitability Map
Um, Dae-Yong ; Lee, Jung-Kuen ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 265~274
DOI : 10.7848/ksgpc.2011.29.3.265
In this study, we tried to analyze the suitability of factory development location in environmental aspects using the Green Development Suitability Map(GDSMap) which was created by GIS analysis about the optimal location of development projects. For this, it was evaluated a influence of various environmental factors that were caused by developments by setting the legislative, environmental and ecological assessment items. In addition, we made the GDSMap by reflecting the characteristics of region & development project overall. And, it were compared a location distribution on the GDSMap & NEZMap(National Environmental Zoning Map) to analyze a suitability of factory development location about the 39 factories located in study area. Results of analysis, the factory locations of about 23% of total development projects were confirmed that it was performed in development restrictions area on the NEZMap which was utilized current in selecting the location of development projects. And the factory locations of about 31% of total development projects could confirm that it was performed in development restrictions area on the GDSMap which was made in this study. Therefore, it was judged that it must be determined the development location by considering the characteristics of development projects & that region when selecting the location of various development projects.
Exploration for Underwater Topography using Interferomtric Metho
Kim, Myoung-Bae ; Kwak, Kang-Yul ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 275~281
DOI : 10.7848/ksgpc.2011.29.3.275
To acquire an underwater topographic information is necessary for the design and construction of structures in marine and inland water. It consists of water depth information by bathymetric survey and underwater bottom topography image information can be obtained by side scan sonar in different ways. For the purpose of providing high quality data by means of engineering site survey, it is necessary to apply simultaneous acquisition of two information and carry out the integrated interpretation to each other. The present research aims to obtain information of the underwater topography and water depth at the same time using interferometer technique, and to validate interferometer technique with accuracy estimation.
Evaluation of Long-term Stability of Interior Orientation Parameters of a Non-metric Camera
Jeong, Soo ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 283~291
DOI : 10.7848/ksgpc.2011.29.3.283
In case of metric cameras, not only fiducial marks but also various parameters related to camera lens are provided to users for the interior orientation process. The parameters have been acquired through precise camera calibration in laboratory by camera maker. But, in case of non-metric cameras, the interior orientation parameters should be determined in person by users through camera calibration with great number of control points. The interior orientation parameters of metric cameras are practically used for long time. But in case of non-metric cameras, the long-term stability of the interior orientation parameters have not been established. Generally, the interior orientation parameters of non-metric cameras are determined in every photogrammetric work. It`s been an obstacle to use the non-metric camera in photogrammetric project because so many control points are required to get the interior orientation parameters. In this study, camera calibrations and photogrammetric observations using a non-metric camera have been implemented 25 times periodically for 6 months and the results have been analyzed. As a result, long-them stability of the interior orientation parameters of a non-metric camera is analyzed.
Generation of Korean Ionospheric Total Electron Content Map Considering Differential Code Bias
Lee, Chang-Moon ; Kim, Ji-Hye ; Park, Kwan-Dong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 293~301
DOI : 10.7848/ksgpc.2011.29.3.293
The ionospheric delay is the largest error source in GPS positioning after the SA effect has been turned off in May, 2000. In this study, we used 44 permanent GPS stations being operated by National Geographic Information Institute (NGII) to estimate Total Electron Content (TEC) based on pseudorange measurements phase-leveled by a linear combination with carrier phases. The Differential Code Bias (DCB) of GPS satellites and receivers was estimated and applied for an accurate estimation of the TEC. To validate our estimates of DCB, changes of TEC values after DCB application were investigated. As a result, the RMS error went down by about an order of magnitude; from 35~45 to 3~4 TECU. After the DCB correction, ionospheric TEC maps were produced at a spatial resolution of
. To analyze the effect of the number of sites used for map generation on the accuracy of TEC values, we tried 10, 20, 30, and 44 stations and the RMS error was computed with the Global Ionosphere Map as the truth. While the RMS error was 5.3 TECU when 10 sites are used, the error reduced to 3.9 TECU for the case of 44 stations.
A Study on the Development Plan of Situation-Aware Service Based on the Characteristics Analysis of Smartphone
Lee, Hyun-Jik ; Koo, Dae-Sung ; Park, Chan-Ho ; Lee, Jung-Bin ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 303~309
DOI : 10.7848/ksgpc.2011.29.3.303
Situation awareness services which increasingly expand their influence in everyday life can be classified into location-based service and social network service. Their quality of service (QoS) can be differed based on the location accuracy of smart phones and accuracy of directional recognition technology. This study was conducted to analyze GPS, digital compass, radio communication, and geospatial web information which can provide a clue in using the situation aware services based on lab experiments and surveys. According to the result of lab experiment on accuracy of determining location / direction with smart phones, owing to inherent lack of indoor accuracy in determining position and direction, as well as errors in spatial data used as platform, it was found that devices were not provided with sufficiently accurate data when using the situation aware services indoors compared to outdoors. To enhance accuracy of determining indoor positions, there are several methods including location metering based on Wi-Fi, which had several problems compared with GPS used in outdoor environment. Thus, it was determined that more study would be necessary to solve these issues.
Analysis about Seismic Displacements Based on GPS for Management of Natural Disaster
Park, Joon-Kyu ; Yun, Hee-Cheon ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 311~318
DOI : 10.7848/ksgpc.2011.29.3.311
On March 11, 2011, an 9.0-magnitude earthquake occurred near the northeastem coast Japanese. It was the largest earthquake that hit Japan since the beginning of modern seismometry. The earthquake occurred 179km east of the Sendai, Miyagi Prefecture, leaving about 27,000 of people confirmed dead, injured or missing due to the earthquake and tsunami. In this study, crustal Deformation in Mizusawa, Tsukuba and Usuda station were calculated based on GPS data in IGS station of Japan. The observation data were processed by precise point positioning and relative-positioning method using on-line GPS data processing services and a high precision scientific GPS/GLONASS data processing software. The coseismic displacements in IGS stations before and after the earthquake were analyzed using kinematic precise point positioning method, and the crustal deformation of the areas before and after the earthquake were precisely calculated using the relative-positioning method. The results of the study calculated precise coordination that the RMSE is maximum
, respectively and showed that Mizusawa station moved 2.6m southeast by the earthquake.
Calculation of orthometric correction by observed gravity at Korean benchmark line
Kim, Cheol-Young ; Lee, Suk-Bae ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 29, issue 3, 2011, Pages 319~325
DOI : 10.7848/ksgpc.2011.29.3.319
It has been used not orthometric height but normal orthometric height for the official height in Korean benchmark because it has been used not observed gravity but normal gravity for the computation of orthometric correction. The purpose of this study is to propose height renewal method of Korean benchmark. For this purpose, we observed gravity by CG5 digital gravimeter in both the first benchmark line between Sokcho and Gangneung area and the second benchmark line between Soksa and Inje area. We calculated relative gravity value and orthometric correction in all benchmarks. So, the maximum orthometric correction shows -0.349mm in the first benchmark line, and the maximum orthometric correction shows -44.060mm in the second benchmark line. In conclusion, we can confirm that the orthometric correction based on observed gravity is necessary for more accurate official height computation in the Korean benchmark.