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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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Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography
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Volume & Issues
Volume 28, Issue 6 - Dec 2010
Volume 28, Issue 5 - Oct 2010
Volume 28, Issue 4 - Aug 2010
Volume 28, Issue 3 - Jun 2010
Volume 28, Issue 2 - Apr 2010
Volume 28, Issue 1 - Feb 2010
Selecting the target year
A Study for Forest Research using Airborne Laser Scanning
Kim, Eun-Young ; Wie, Gwang-Jae ; Cho, Heung-Muk ; Yang, In-Tae ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 299~304
Depending on the progress of the surveying and information processing technology, the rapidly developing field of spatial information and the 3D real world spatial information for a variety of content on the computer was able to easily access. In this research, to study on the spot or to use aerial photographs to measure trees of the acquired data, calculate the trees height, forest area and capacity, determine the distribution of the density of acquired points in the forest and analyze accurate and objective information was acquired. The United States, Canada and so on through the capacity of trees biomass, forest resource analysis, time series monitoring, wildfire behavior modeling and applied research and has been declared. During worldwide is increasing interest in forest resources. In nationally, extensive research and analysis of the forest consists of the correct management and protection of forest resources to be effective.
Determination of 3D Object Coordinates from Overlapping Omni-directional Images Acquired by a Mobile Mapping System
Oh, Tae-Wan ; Lee, Im-Pyeong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 305~315
This research aims to develop a method to determine the 3D coordinates of an object point from overlapping omni-directional images acquired by a ground mobile mapping system and assess their accuracies. In the proposed method, we first define an individual coordinate system on each sensor and the object space and determine the geometric relationships between the systems. Based on these systems and their relationships, we derive a straight line of the corresponding object point candidates for a point of an omni-directional image, and determine the 3D coordinates of the object point by intersecting a pair of straight lines derived from a pair of matched points. We have compared the object coordinates determined through the proposed method with those measured by GPS and a total station for the accuracy assessment and analysis. According to the experimental results, with the appropriate length of baseline and mutual positions between cameras and objects, we can determine the relative coordinates of the object point with the accuracy of several centimeters. The accuracy of the absolute coordinates is ranged from several centimeters to 1 m due to systematic errors. In the future, we plan to improve the accuracy of absolute coordinates by determining more precisely the relationship between the camera and GPS/INS coordinates and performing the calibration of the omni-directional camera
Computation of Complete Bouguer Anomalies from Free-air Anomalies in East Sea
Yun, Hong-Sik ; Lee, Dong-Ha ; Kim, Young-Hyun ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 317~328
This paper describes the results of complete Bouguer anomalies computed from the Free-air anomalies that derived from Sandwell and DNSC08 marine gravity models. Complete bouguer corrections consist of three parts: the bouguer correction (Bullard A), the curvature correction (Bullard B) and the terrain correction (Bullard C). These all corrections have been computed over the East Sea on a
elevation data (topography and bathymetry) derived from ETOPO1 global relief model. In addition, a constant topographic (sea-water) density of
) has been used for all correction terms. The distribution of complete bouguer anomalies computed from DNSC08 are -34.390 ~ 267.925 mGal, and those from Sandwell are -32.446 ~ 266.967 mGal in East Sea. The mean and RMSE value of the difference between DNSC08 and Sandwell is
. The highest value of complete bouguer anomaly are found around the region of
(has the lowest bathymetry) in both models. These values show that the gravity distribution of both models, DNSC08 and Sandwell, are very similar. They indicate that satellite-based marine gravity model can be effectively used to analyze the geophysical, geological and geodetic characteristics in East Sea.
Performance evaluation of Terrestrial Laser Scanner over Calibration Baseline
Lee, In-Su ; Lee, Jae-One ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 329~336
This study deals with the measurement of reflectivity as well as the distance accuracy with Terrestrial Laser Scanner(TLS) using time of flight methods and near infrared wave length, for a variety of user-made targets. Especially, point clouds' reflection to several targets was measured with Gretag Macbeth il spectrophotometer in the office. And the distance accuracy in comparison to reference distance for TLS performance evaluation, was tested after scanning the user-made targets and measuring the inter-pillars distances over the precise EDM calibration baseline. The results of test was shown that except white resin objects, with approx. 10m and 170m inter-pillar distances, other targets achieved the distance accuracy of several millimeters(mm) with respect to standard distances. Future work should be concentrate on a few parameters influencing on the distance accuracy such as atmospheric correction, instrument correction, the additive constant or zero/index correction, etc.
Profile Design and Implementation of Aerial Photogrammetry WPS for Standard GIS Web Service (With Emphasis on Affine Transformation and Resection)
Kim, Byung-Jo ; Yom, Jae-Hong ; Kyung, Min-Ju ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 337~345
In general, Digital Photogrammetry is based on independent workstation system, which is costly and has complex process. In this research, a new approach method regarding Digital Photogrammetry procedure is suggested using Web Processing Service, which is a GIS standard proposed by Open Geospatial Consortium. For the experiment, many Generic Processes were defined through WPS profiling procedure which defines standard unit for Photogrammetry, and with the defined process each server and client S/W module was implemented based on WPS standards. In this paper, many users can be expected to share and reuse unit process in WPS server through the web.
Research on Standard Cross Sectional Survey Length of Cross-to-Nature Sanggachun Stream
Park, Seung-Ki ; Jung, Nam-Su ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 347~352
There is a lack of survey standard for cross-to-nature small stream. In this research, we analyzed cross sectional survey data of Sanggachun stream, calculated variant quantity of soil, and suggested a survey interval. Descriptive analysis of cross sectional survey data shows the trend of stabilization; mean interval of survey is 14.91m(min: 7.0m, max: 39m), mean cross sectional variances are
) in 2004,
) in 2005. Calculating results of variance quantity based on data of 65 cross sections show similar trends in 15m, 30m, 45m, 60m but different with results of 75m, 90m with Post-Hoc Test in statistical verification. We suggested standard cross sectional survey length of cross section for natural style small stream as 50m based on fitting results of standard variation of erosion and cumulation quantity by survey interval.
Automatic Registration of High Resolution Satellite Images using Local Properties of Tie Points
Han, You-Kyung ; Byun, Young-Gi ; Choi, Jae-Wan ; Han, Dong-Yeob ; Kim, -Yong-Il ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 353~359
In this paper, we propose the automatic image-to-image registration of high resolution satellite images using local properties of tie points to improve the registration accuracy. A spatial distance between interest points of reference and sensed images extracted by Scale Invariant Feature Transform(SIFT) is additionally used to extract tie points. Coefficients of affine transform between images are extracted by invariant descriptor based matching, and interest points of sensed image are transformed to the reference coordinate system using these coefficients. The spatial distance between interest points of sensed image which have been transformed to the reference coordinates and interest points of reference image is calculated for secondary matching. The piecewise linear function is applied to the matched tie points for automatic registration of high resolution images. The proposed method can extract spatially well-distributed tie points compared with SIFT based method.
Principal Component Analysis of GPS Height Time Series from 14 Permanent GPS Stations Operated by National Geographic Information Institute
Kim, Kyeong-Hui ; Park, Kwan-Dong ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 361~367
We produced continuous vertical time series of 14 permanent GPS stations operated by National Geographic Information Institute by processing about five years of data. Then we computed the height velocities by using a linear regression fitting of those time series, and did principal component analysis to understand the overall characteristics of the series. The prominent signal obtained as the first mode of PCA results showed an average of 4.2 mm/yr vertical velocity. The values of the first mode eigenvectors were consistent at all sites. Thus, we concluded that all the 14 stations are uplifting nearly at the same velocity for the test period. Then changes of precision before and after removing the first mode signal from the 14 height time series were analyzed. As a result, the precision improved 34.8% on average.
Platform Calibration of an Aerial Multi-View Camera System
Lee, Chang-No ; Kim, Chang-Jae ; Seo, Sang-Il ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 369~375
Since multi-view images can be utilized for 3D visualization and surveying as well, a system calibration is an essential procedure. The cameras in the system are mounted to the holder and their locations and attitudes are relatively fixed. Therefore, the locations and the attitudes of the perspective centers of the four oblique looking cameras can be calculated using the location and attitude of the nadir looking camera and the boresight values between the cameras. In this regard, this research is focusing on the analysis of the relative location and attitude between the nadir and oblique looking cameras based on the results of the exterior orientation parameters after the aerial triangulation of the real multiview images. We acquired high standard deviations of the relative locations between the nadir and oblique cameras. Standard deviations of the relative attitudes between the cameras were low when only the exterior orientations of the oblique looking cameras were allowed to be adjusted. Moreover, low standard deviations of the relative attitudes came when we considered not all the exterior orientations of the cameras but the attitudes of them only.
A Study on the Real Time Monitoring of Long Span Bridge Behavior Using GPS
Choi, Byoung-Gil ; Sohn, Duk-Jae ; Na, Young-Woo ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 377~383
This study aims to develop the system which is able to monitor long span bridge behavior in real time using GPS. Through measuring displacement of long span bridge by GPS in real time, over all 3D behavior of bridge could be analyzed and managed. Monitoring system of long span bridge which is developed in this study is able to manage in real time the safety of bridge by transmitting horizontal and vertical displacement of bridge, and danger signals to an integrated operations center. Also it is able to monitor the absolute behavior of long span bridge by GPS, and to construct a national bridge safety management networks.
A Study on the Application Technique of 3-D Spatial Information by integration of Aerial photos and Laser data
Yeon, Sang-Ho ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 28, issue 3, 2010, Pages 385~392
A LiDAR technique has the merits that survey engineers can get a large number of measurements with high precision quickly. Aerial photos and satellite sensor images are used for generating 3D spatial images which are matched with the map coordinates and elevation data from digital topographic files. Also, those images are used for matching with 3D spatial image contents through perspective view condition composed along to the designated roads until arrival the corresponding location. Recently, 3D aviation image could be generated by various digital data. The advanced geographical methods for guidance of the destination road are experimented under the GIS environments. More information and access designated are guided by the multimedia contents on internet or from the public tour information desk using the simulation images. The height data based on LiDAR is transformed into DEM, and the real time unification of the vector via digital image mapping and raster via extract evaluation are transformed to trace the generated model of 3-dimensional downtown building along to the long distance for 3D tract model generation.