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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 27, Issue 6 - Dec 2009
Volume 27, Issue 5 - Oct 2009
Volume 27, Issue 4 - Aug 2009
Volume 27, Issue 3 - Jun 2009
Volume 27, Issue 2 - Apr 2009
Volume 27, Issue 1 - Feb 2009
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Orbit Prediction using Almanac for GLONASS Satellite Visibility Analysis
Kim, Hye-In ; Park, Kwan-Dong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 119~127
Even though there are next generation Global Navigation Systems in development, only GPS and GLONASS are currently available for satellite positioning. In this study, GLONASS orbits were predicted using Keplerian elements in almanac and the orbit equation. For accuracy validation, predicted orbits were compared with precise ephemeris. As a result, the 3-D maximum and RMS (Root Mean Square) errors were 155.4 km and 56.3 km for 7-day predictions. Also, the GLONASS satellite visibility predictions were compared with real observations, and they agree perfectly except for several epochs when the satellite signal was blocked nearby buildings.
Analysis Distribution and Feature of Lunar Gravity Field Using SGM90d Model
Huang, He ; Yun, Hong-Sic ; Lee, Dong-Ha ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 129~138
The lunar gravity field is an important source to understand the lunar interior structure, dichotomy and magma ocean of the moon, furthermore it can be used to study the origin and evolution history of the moon. In this paper, we firstly investigated the history of lunar exploration were performed for determining the lunar gravity field, in addition to investigating the procedure of progress related with the lunar gravity field model and gravity observations techniques. After, we determined practically the gravity anomalies of the moon using the new lunar gravity model, SGM90d (SELENE Gravity Model), which were developed by processing the tracking data from SELENE, the japanese lunar mission. Finally, we compared the lunar gravity anomalies from SGM90d model to the those from existing lunar gravity model (LP165P). As results from the comparison, we can make a sense that 4-way Doppler observations of SELENE is very effective to measure the gravity field on the farside of the moon. The precise lunar gravity field model including the farside of the moon which can be more helpful to understand the dichotomy of moon and to establish the detailed distribution of lunar gravity field, such as a mascon.
Free-air anomaly from Airborne Gravity Surveying
Lee, Ji-Sun ; Kwon, Jay-Hyoun ; Lee, Bo-Mi ; Hong, Chang-Ki ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 139~147
The gravity data collected and reserved in Korea is seriously biased in its distribution. That is, only the west-southern part of the peninsula including Chungcheong and Jeonla area has dense distribution while only a part is covered in Gyoungsang area. Especially, the low density of the gravity data in mountainous area basically limits the accuracy of the gravimetric geoid in Korea. As one of the solution to overcome the problem, an airborne gravity survey were conducted from Dec. 2008
Jan. 2009. In this study, free-air gravity anomaly derived from the airborne gravity data which has consistent quality are presented. The data processing for the airborne gravity is composed of several corrections of errors such as errors from gravity measurement, errors from flight dynamics, errors from GPS, and errors from time synchronization. We presented detailed explanations on the data processing with the final cross-over results. The free-air anomaly from airborne gravity finally shows the cross-over accuracy of 2.21mGal which reflects the precision of each track is 1.56mGal. It is expected that the result from this study will play a role as input data in precision geoid determination with ground and ship-borne gravity data after appropriate fusion process.
Accuracy Analysis of baseline determination using Broadcast ephemeris and Precise ephemeris in GPS surveying
Kim, Cheol-Young ; Lee, Suk-Bae ; Do, Sang-Gyeong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 149~157
The orbit ephemeris of Global Positioning System(GPS) is one element to determine the surveying accuracy and there are broadcasting ephemeris and precise ephemeris, IGS rapid orbit and IGS ultra rapid orbit in the orbit ephemeris of GPS. In this study, test area was selected in Uljin, Kyungsanbukdo and GPS surveying was accomplished at 37 points in the test area. Then baseline solution was done on 74 baseline using broadcasting ephemeris and precise ephemeris and analysis by TGO and the results were compared. Comparison results were showed that there were nearly no difference between the two results but in case of relative precision of the baseline, it was slightly better the baseline results of precise ephemeris which showed 0.706ppm than the baseline results of broadcasting ephemeris which showed 0.708ppm.
Construction of the Airborne Gravity Based Geoid and its Evaluation
Lee, Ji-Sun ; Kwon, Jay-Hyoun ; Lee, Bo-Mi ; Hong, Chang-Ki ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 159~167
To obtain the gravity data with consistent quality and good distribution over Korea, to overcome the difficulties in constructing precision geoid from biased distribution of ground data, to resolve the discrepancy between the ground and ocean gravity data, an airborne gravity survey was conducted from Dec. 2008 to Jan. 2009. The data was measured at the average flying height of 3,000m and the data with cross-over error of 2.21mGal is obtained. The geoid constructed using this airborne gravity data shows the range of 9.34
33.88m. Comparing the geoid with respect to the GPS/levelling data, a precision of 0.145m is obtained. After fitting, the degree of fit to GPS/levelling data was calculated about 5cm. It was found that there exists large biases in the area of south-western and northern part of the peninsular which is considered to be the effect of distorted vertical datum in Korea. Thus, more investigation on vertical datum would be needed in near future.
Accuracy Comparison as World Geodetic Datum Transformation of 1/1000 Digital Map
Yun, Seok-Jin ; Park, Joung-Hyun ; Park, Joon-Kyu ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 169~175
According as standard of measurement is changed to world geodetic system by surveying law revision, we need to transform previous 1/1,000 digital maps as a standards of world geodetic system. And, we should acquire standard strategy to minimize confusion and error by conversion of geodetic surveying standards. Thus, conversion of digital maps must be transformed efficiently and consistently according to notice of relevant standard. As common point, we have used 1/1,000 digital map and local geodetic system coordinates and world geodetic system coordinates that had been used in UIS business of Pusan city and, make a analysis of distortion quantity using KASM Trans Ver 2.2. As the result of distortion quantity calculation about all Pusan city, numbers of area that error is over 0.05m are 35 in case of X(N) and 43 in case of Y(E). Because some business section have especially much error, we divided into 3 areas, that was A,B,C, and analyzed. As a result of analysis, errors of more than 0.05m are occurred only 1 X(E) in the B area and 1 X(N) and 1 Y(E) in the C area. In conclusion, We think It is a good method that we consider a distortion quantity and divide a region, and transfer to world geodetic system for large area like Pusan city.
Accuracy Analysis of Aerial Triangulation using UltraCamX which is Airborne Digital Camera
Lee, Jae-One ; Na, Jong-Gi ; Jung, Chang-Sik ; Bae, Kyoung-Ho ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 177~186
Nowadays, as going to information society based knowledge, the informations are acquired, processed, serviced based digital environment. In surveying field, the trend have been changed from the analog foundation to the digital foundation. Also, aerial photogrammetry is being changed from analog aerial photogrammetry to digital aerial photogrammetry. In this paper, the analysis of accuracy is performed for the comparison of traditional aerial photogrammetry with digital aerial photogrammetry usign UltracamX in AT and Block Adjustment. As the results, Bundle adjustment in digital aerial photogrammetry with GPS/INS have more advantages than traditional independent adjustment in analog aerial photogrammetry. Digital aerial photogrammetry contributes the higher accuracy in AT and block adjustment more than analog aerial photogrammetry.
Study of Servo Controller for Improving Position Accuracy of 3D Terrestrial Laser Scanner
Yu, Jong-Wook ; Jeong, Joong-Yeon ; Kim, Tae-Hyung ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 187~194
This study is to improve position accuracy by selecting proper a servo motor and applying FOC(Field Oriented Control) on developing a 3D terrestrial laser scanner. A 3D terrestrial laser scanner under developing has range of scanning of azimuth 360
and elevation 270
. It is implemented by precise controlling of a azimuth motor and a elevation motor. In the consequence of study, we have known that position accuracy of the motor can be able to be improved with constant torque of the motor by using FOC(Field Oriented Control). The control technic of the motor is possible to apply a 3D terrestrial laser scanner as well as a robotic total station.
Development of Management System for Feature Change Information using Bid Information
Heo, Min ; Lee, Yong-Wook ; Bae, Kyoung-Ho ; Ryu, Keun-Hong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 195~202
As the generation and application of spatial information is gradually expanded not only in traditional surveying fields but also a CNS and an ITS recently. The Accuracy and the newest of data grow to be an important element. But digital map is updated with system based tile. So, it is hard to get the newest of data and to be satisfied with user requirements. In this study, management system is developed to manage feature change efficiently using bid informations from NaraJangter which service the bid informations. A construction works with change possibility of feature from bid informations are classified and are made DB. And the DB is used as the feature change forecast informations. Also, It is converted from bid information of text form to positioning informations connected to spatial information data. If this system is made successfully, this system contributes to reduce the cost for the update of digital map and to take the newest date of spatial informations.
A Study on the Accuracy Improvement of Control Point Surveying of Photograph Using Digital Camera
Kim, Kye-Dong ; Park, Joung-Hyun ; Lee, Young-Wook ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 203~211
With supply of the domestic digital camera, the relative importance of the digital camera is coming to be high gradually on aerial photogrammetry, the image of digital camera is more applied in image map or digital topographic map production. But, there are cases that do not have position information or attitude information of each photograph in digital camera results. Therefore, we wish to present additional method to get more accurate photograph control point result. In this study, One is called A method, which is the case of entering positioning information of principal point from topographic map as default values that are need to extract tie point automatically using by 56 pieces of photography that are photographed by DMC to the extent to 5 courses and 35 GCP points. The other is called B-method, which is the case of entering exterior orientation parameters that are processed by block adjustment for A-method using by 4 control points in method-1 as default values. We have analyzed about results per control points arrangement for two cases using MATCH-AT that is photograph control point measurement S/W of Germany INPHO company. As a result of analysis, accuracy of B-method was better than that of A-method, and we could get more accurate results if block adjustments are executed including self calibration. Also, it is more effective in expense side that using self calibration for photograph survey in B-method because can reduce GCP numbers.
Calculation of Geometric Geoidal Height by GPS Surveying on 1st and 2nd order Benchmark Line
Lee, Suk-Bae ; Kim, Jin-Soo ; Kim, Cheol-Young ; Kwon, Jay-Hyoun ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 213~223
In geoid modelling field, it is very important the GPS/leveling data because it could be check-out the accuracy of gravimetric geoid and computed the hybrid geoid. In this study, GPS surveying was accomplished in the test area including mountainous area to improve the GPS/leveling data density in Korea. And the geometric geoidal heights was calculated using the GPS/leveling data in the test area and the accuracy of the geoidal heights was analyzed. For this study, GPS surveying was accomplished on the 211 1st and 2nd order benchmarks in Gyeongbuk province and 198 GPS/leveling data were achieved after both baseline analysis and network adjustment. Geometric geoidal heights were calculated using these 198 GPS/leveling data and the accuracy analysis was done by comparison with the geoidal heights from EGM2008 geopotential model. The results showed that the bias and standard deviation computed from 190 GPS/leveling data after gross removal was -0.185
0.079m. And also, the accuracy analyses according to the benchmark order, baseline length, and altitude were accomplished.
GPS/INS Integration and Preliminary Test of GPS/MEMS IMU for Real-time Aerial Monitoring System
Lee, Won-Jin ; Kwon, Jay-Hyoun ; Lee, Jong-Ki ; Han, Joong-Hee ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 225~234
Real-time Aerial Monitoring System (RAMS) is to perform the rapid mapping in an emergency situation so that the geoinformation such as orthophoto and/or Digital Elevation Model is constructed in near real time. In this system, the GPS/INS plays an very important role in providing the position as well as the attitude information. Therefore, in this study, the performance of an IMU sensor which is supposed to be installed on board the RAMS is evaluated. And the integration algorithm of GPS/INS are tested with simulated dataset to find out which is more appropriate in real time mapping. According to the static and kinematic results, the sensor shows the position error of 3
4m and 2
3m, respectively. Also, it was verified that the sensor performs better on the attitude when the magnetic field sensor are used in the Aerospace mode. In the comparison of EKF and UKF, the overall performances shows not much differences in straight as well as in curved trajectory. However, the calculation time in EKF was appeared about 25 times faster than that of UKF, thus EKF seems to be the better selection in RAMS.
User-Oriented Digital Maps for Supporting Decision Making
Lee, Dong-Cheon ; Lee, Young-Wook ; Park, Ki-Surk ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 235~247
Map is information media for human life. Recently, innovative map making technology has been developed and most updated various data are provided to map users. In consequence, use of maps is rapidly increasing in various applications. One of the examples is car navigation map because navigation maps provide reliable and necessary information with convenient way. Therefore, maps are to be changed to user-oriented from map making-oriented design. The main goal of spatial data infrastructure is to allow various users to access the real world information easily for decision making. However, most of the digital maps are focused on map making aspect such as providing up-to-date data, acquisition of accurate data with state-of-the-art technology, and addition of layers (For example, ortho-images and DEMs). If map data processing tools are to be provided with the digital maps, users could utilize maps for decision making without professional software or knowledge. Therefore, objective of this paper is to propose scheme of the digital map data processing service with application examples.
Image Georeferencing using AT without GCPs for a UAV-based Low-Cost Multisensor System
Choi, Kyoung-Ah ; Lee, Im-Pyeong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 249~260
The georeferencing accuracy of the sensory data acquired by an aerial monitoring system heavily depends on the performance of the GPS/IMU mounted on the system. The employment of a high performance but expensive GPS/IMU unit causes to increase the developmental cost of the overall system. In this study, we simulate the images and GPS/IMU data acquired by an UAV-based aerial monitoring system using an inexpensive integrated GPS/IMU of a MEMS type, and perform the image georeferencing by applying the aerial triangulation to the simulated sensory data without any GCP. The image georeferencing results are then analyzed to assess the accuracy of the estimated exterior orientation parameters of the images and ground points coordinates. The analysis indicates that the RMSEs of the exterior orientation parameters and ground point coordinates is significantly decreased by about 90% in comparison with those resulted from the direct georeferencing without the aerial triangulation. From this study, we confirmed the high possibility to develop a low-cost real-time aerial monitoring system.
Development of a Multi-View Camera System Prototype
Park, Seon-Dong ; Seo, Sang-Il ; Yoon, Dong-Jin ; Shin, Jin-Soo ; Lee, Chang-No ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 261~271
Due to the recent rise of a need for 3 dimensional geospatial information on urban areas, general interest in aerial multi-view cameras has been on an increase. The conventional geospatial information system depends solely upon vertical images, while the multi-view camera is capable of taking both vertical and oblique images taken from multiple directions, thus making it easier for the user to interpret the object. Through our research we developed a prototype of a multi-view camera system that includes a camera system, GPS/INS, a flight management system, and a control system. We also studied and experimented with the camera viewing angles, the synchronization of image capture, the exposure delay, the data storage that must be considered for the development of the multi-view camera system.
Image Analysis for Data Acquisition of Restore Cultural Assets
Yun, Hee-Cheon ; Sohn, Duk-Jae ; Park, Joon-Kyu ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 273~279
The descendants have a responsibility to conserve their cultural treasure and hand it down to posterity. Most of existing wooden properties, affected by environmental factors for many years, have been rebuilt or repaired many times. Kwandeogjeong, Cultural Properties Materials 322, has gone through rebuilding or repairing 11 times. It was natural that Kwandeogjeong lost its originality and attempt to restore it was made by Cultural Heritage Administration of Korea. But the restoration depends on a piece of picture, which was taken before 1900. It had been impossible to draw any data from the picture for restoration. In this study, I was able to obtain data for its restoration through geometrical analysis, using the vanishing point of the picture. These data were also used as preliminary data for its restoration.
The Study on Coordinate Transformation for Updating of Digital Map from Construction Drawing Data
Park, Seung-Yong ; Lee, Jae-Bin ; Park, Woo-Jin ; Yu, Ki-Yun ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 281~288
In the paper, we try to develop the methodology for updating road networks of large-scale digital maps by using construction drawing data. For the purpose, it is pre-requite step to merge road networks detached in CAD drawing data. As such, tie points are identified in neighboring drawings and used for solving the parameters of 2D conformal transformation between drawings. Then, the merged road network in CAD data is transformed to the coordinate system of digital maps. In the process, IPs in the drawings are considered as control information and 2D affine transformation is selected for coordinate transformation. Through the experiments with real dataset, we can identify that the developed method is valid and generally applicable.
Automatic Extraction of Training Dataset Using Expectation Maximization Algorithm - for Automatic Supervised Classification of Road Networks
Han, You-Kyung ; Choi, Jae-Wan ; Lee, Jae-Bin ; Yu, Ki-Yun ; Kim, Yong-Il ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 27, issue 2, 2009, Pages 289~297
In the paper, we propose the methodology to extract training dataset automatically for supervised classification of road networks. For the preprocessing, we co-register the airborne photos, LIDAR data and large-scale digital maps and then, create orthophotos and intensity images. By overlaying the large-scale digital maps onto generated images, we can extract the initial training dataset for the supervised classification of road networks. However, the initial training information is distorted because there are errors propagated from registration process and, also, there are generally various objects in the road networks such as asphalt, road marks, vegetation, cars and so on. As such, to generate the training information only for the road surface, we apply the Expectation Maximization technique and finally, extract the training dataset of the road surface. For the accuracy test, we compare the training dataset with manually extracted ones. Through the statistical tests, we can identify that the developed method is valid.