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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 13, Issue 2 - Dec 1995
Volume 13, Issue 1 - Jun 1995
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Coordinate Transformation between Korean Geodetic System and WGS-84 by 7 Parameter Coordinste Transformation Method
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 117~124
The main purpose of the present study was to investigate coordinate transformation based on two different systems: one was the World Geodetic System 1984(WGS84) adopted as a reference system for GPS satellite surveying;and another was the current Korean geodetic system based on Bessel ellipsoid. For this purpose, three methods were used to determine 7 parameters as follows: Bursa-Wolf model, Molodensky-Badekas model, and Veis model. The coordinate transformation was carried out using simillity transformation applied the obtained 7 parameters and the precision of transformed coordinate was evaluated. From this results, we found that Bursa-wolf model is more suitable than others for the determination of transformation parameters in Korea.
Geoid Models Referred to the Bessel Ellipsoid of South Korea
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 125~133
The geoidal heights of a country may be computed from astrogedetic, gravimetric or satellite data. In this paper, the geoid models to the Bessel ellipsoid(KGM95-A) have been determined by the astrogedetic method, which is surface fitting techniques using deflections of the vertical and geoid height constraints. Transformation equations and the gravimetric geocentric geoid(KGM93-C) were applied to obtain the geoid height referred to the Tokyo Datum of the Korean geodetic network, the comparison of the astrogedetic results and discussions of the geoid information were added.
A Study on the Underground Utilities Data Base by UTIC System
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 135~140
As the expansion of metropolis has been going, the role of underground utilities has importantly increased. The existed data is difficulty to acquire accurate data and computerize it. In the construction site, Particularly, the map of existed underground utilities has included so much inaccurate data. This study suggestes that making terrain map and surveying if the position of underground utilities are simultaneously done, also this method improves data accuracy and makes the computerized map such as CAD easy match the map of established underground map. The excution of this study collectes data by surveying of terrain and under ground utilities. Through new data collection, we can plot and acquire the position of real under ground utilities and attribute data about them.
Study on the Building of Digital Terrain Model Using Satellite Remotely Sensed Data and Its Applications
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 141~151
In generating DTM as basic data to GIS, the use of existing map is difficult to aquire current data and the method using airphotos needs cost for stereoplotting and ground control surveying. So, the method of DTM generation by satellite imagery is promising because satellite is able to observe wide area at once. In this study the program for SPOT bundle adjustment and image matching based on Coarse to Fine method is developed and various image enhancement algorithm is used for more accurate DTM generation and also evaluation of accuracy was carried out. Further more, orthophoto, a bird's eye-view, contour map producing, net-work analysis and terrain analysis were performed for GIS applications using generated DTM in this study. Generated DTM using SPOT stereo imagery is useful for GIS applications such as automated mapping, facility management, national geographic information system. Moreover developed automatic DTM generation pro-gram is studied, tested and verified more to be applicable to all the area.
A Study on the Characteristics of the Coordinates Transformation between Ellipsoids on the Area Measured by GPS
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 153~162
The coordinate transformation both WGS84 and Bessel ellipsoids is essential to use of GPS in South Korea. Especially, for transformation considered the needed accuracy and the regional characteristics, the study about geoid modeling and the characteristics on the transformed area should be done. The aim of this study define the characteristics of the transformed coordinates according to transformation methods and the area measured by GPS. For this, large network that include South Korea, four regional network consist of large network, and local net-work include Incheon city designed. Geoid model based on Bessel suitable to South Korea selected from study about the effects of the assumed geoid height at the geodetic origin, and then coefficients computed according as transformed area and methods. Also, the transformed characteristics of the large coefficients, the regional coefficients, and the local coefficients according to methods compared, analyzed synthetically.
Design of Color Map Image Using Intensity-Adjustment Method
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 163~168
There are four types of color model to repesent color, which are RGB, IHS, CMY, and YIQ color model. RGB color model is the designation of the digital numbers(DNs) of the three primary colors(red, green, and blue), which are used to produce color images on color monitors. IHS color model is the designation of in-tensity, hue, and saturation(IHS). An advantage of considering color in terms of IHS over that of RGB is arrives more easily at a desired color product mathematically. In this study, authors use the IHS transformation and in-tensity-adjustment method to produce the color map images with Landsat TM and scanned map image. And, authors suggest the problems and their solutions when users produce the desired new images with satellite images and map images.
The Prediction of Coastal Topographic Deformation Using Change Detection Technique
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 169~176
Change detection is the technique to represent the change of pixel by pixel and band by band between
times. In this study, authors analize the beach-sand movement using digital image analysis, interpolation and digital terrain model by leveling every years at a coastal area. This paper suggests the useful beach-maintainance plan based on the sand movement and its direction, direction and influence of ocean current, change of oceansand erosion and sedimentation, and area of erosion and sedimentation.
Determination of the Gravity Anomaly in the Ocean Area of Korean Peninsula using Satellite Altimeter Data
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 177~185
Gravity anomalies were recovered on a
grid using the sea surface height data obtained from the combination of Geosat, ERS-1, Topex/Poseidon altimeter data around Korean Peninsula bounded by latitude between
In order to recover the gravity anomalies from SSH(Sea Surface Height), inverse FFT technique was applied. The estimated gravity anomalies were compared with gravity anomalies measured by shipboard around Korean Peninsula. In comparison with the differences of gravity anomaly between measured data and altimeter data, the mean and the standard deviation were found to be -0.51 mGal and 13.48 mGal, respectively. In case of comparison between the measured data and the OSU91A geopotential model, the mean and the standard deviation were found to be 11.93 mGal and 19.19 mGal, respectively. The comparison of gravity anomalies obtained from the OSU91A geopotential model and the altimeter data was carried out. The results were mean of 5.30 meal and standard deviation of 19.62 mGal. From the results, we could be concluded that the gravity anomalies computed from the altimeter data is used to the geoid computation instead of the measured data.
Design Digital Information System for Management of Cultural Properties
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 187~198
An aim of this study performs effective management of cultural properties by developing digital information system which unifies dualitied management system. This study used close range photogrammetry for acquisition of digital information and designed database using GSIS to join spatial and nonspatial data. The result of this study achives the high level management and provides quickly precise data.
Digital Image Processing Technique for Measurements from Non-metric Photographs
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 199~208
Significant developments in the use of digital imagery for close-range photogrammetric metrology have occured in the last few years because of technological advances in digital image processing. Present day needs for applications of digital image processing technique to measurements of photographs obtained with non-metric camera at reduced cost, automation and convenience. In order for this application to be useful, a detailed procedure must be developed. Investigation of this study is given to the detailed procedure for the digital measurements of the object space data from the scanned non-metric photographs.
Determination of Route alignment improvement parameter for Speed up in Railway curve sections
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 209~218
It is important role that railway speed up plays in realizing an affluent society in future. Curved lines zone have crucial effects on the speed of train travel, at the curved lines zone, it requires to set cant and slack for safety running of train and comfortable ride of passengers, a compromise is therefore to accept a certain degree of cantdeflciencyforthevarioustrain. In this study, it was presented that effective maintenance method according to the investigation of cant value in radius of curvature and analysis safety running of train, calculation of lateral acceleration as cant deficiency, and we obtain the effect of speed up appling route alignment improvement parameter in curved lines zone.
Feasibility of Management Plan in Electric Power Structure using Close-Range Photogrammetry
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 219~228
The facilities of electric power plant which were constructed in and after the 1960's are superannuated in these days. We are expanding them applying an incressary to secure a safe plan for them. In this study, for a feasibility of management plan in electric power structure, a RC test prame was manufactured for monitoring and calculation of variation using close range photogrammetry. On the basis of this data, monitoring and calculating of variation in soil wall building site were carried out. Also a survey and analysis of a influence which occured to a structure near by exactitude site. All of these afford data for a management plan in electric power structure.
A study on the 3-D positional analysis for track of magnetically levitated vehicles
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 229~236
This study is the 3-D positional analysis for track of magnetically levitated vehicles to precise construction and periodical safe diagnosis by photogrammetry. In the result, we could improve the accuracy of Z as well as X, Y using the modified control points of spatial distribution to the plane distribution of the absolutly effective control points to accuracy and diagnosis the the track of magnetically levitated vehicles using the below 1㎜ accuracy. And we could analysis the 3-D precise positions and efficiently decide the geometric characteristics of the cant and gradient to the instrument.
A Study on the Determination of WGS84 Geoidal Height by the Interpolation Methods
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 237~244
In this study, we made WGS84 geoidal height model from GPS measurements for bench marks and calculated geoidal height of B.Ms which were selected check points using the hi-linear, trend surface fitting and triangulation interpolation method. From these, the interpolation accuracy was studied. Also, we tried to study accuracy of height transformation by making up orthometric height with latitude and longitude on Bessel ellipsoid for bench marks which were calculated by applying transformation parameters that were got GPS measurements for precise primary control stations. As a result of this study, the WGS84 geoidal height and orthometric height could be determined as a deviation value of 20 cm.
Changes in Topics of Surveying related Papers in Korea - Phase I
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 245~275
Surveying related papers and books presented and published since 1957 in Korea are investigated and gathered, and the list by the topics of the papers is prepared. And changes in the topics of surveying related researches are studied through the changes in the titles of the presented papers. The fields of general surveying and photogrammetry have been doing their role to lead surveying researches since 1957, and those of Geodesy, Remote Sensing, GIS and GPS are rapidly growing as advanced fields. Especially GIS is a widespreading field as being used in many socio-environment parts, recently gets a big attentions by the National GIS Project. GPS and Remote Sensing have contributed to make the surveying area an advanced technology by employing newly developed technigues to GPS receivers and satellite imagery.
A study on the comparison of accuracy of evaluation method of earthwork volume using on DTM
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 277~283
In the study, an accuracy of earthwork volume is evaluated according to different methods of the calculation with different criteria. The criteria applied to this study are a interpolation method, a grid intavals and the method of earthwork evaluation. A numerical test has performed on two different terrain models with four different methods of calculation in the earthwork volume and two different grid intervals. The end area method, prismoidal formular, Simpson's formular, and middle area method are applied to the calculation of the earthwork volume. As a result of this study, it is showed that the moving average method with the first order term gives the most accurate result in interpolation, and that also the prismoidal formular and Simpson's formular gives more accurate result than average and area method and middle area method in the calculation of earthwork volume.
Geometric Geoid Determination in South Korea using GPS/Levelling Data
Yun, Hong-Sic ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 285~289
This paper describes the determination of geoid using height data measured by GPS and Spirit Levelling. The GPS data of the 88 stations were used to determine the geoid undulation (N) which can be easily obtained by subtracting the orthometric height(H) from the ellipsoidal height(h). From the geoid undulation (N) calculated at each station mentioned above, geoid plots with a contour interval of 0.25 m were drawn using two interpolation methods. The following interpolation methods were applied and compared with each other: Minimum Curvature Method and Least Squares Fitted Plane. Comparison between geometric geoid and gravimetric geoid undulation by FFT technique was carried out.
Computations of Terrain Effect within a Limited Area in Geodetic Gravity Field Modelling
Yun, Hong-Sic ; Suh, Yong-Woon ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 291~298
This paper describes the test results of terrain corrections as the short wave length effect and geoid effects in gravity field modelling using Digital Terrain Model(DTM) in Korea. For a rigorous determination of terrain correction a dense grided DTM data wave prepard spacing
was used for the computation of terrain effects. From the results obtained by the mass prism model and the mass line model, we were found that the terrain effects are large depend on the topography in the test area. It means that we should considered the terrain effects for the precise geoid determination.
Distinct Point Detection : Forstner Interest Operator
Cho, Woo-Sug ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 13, issue 2, 1995, Pages 299~307
The extraction of distinct points such as corner points and circular features is a basic procedure in digital photogrammetry and computer vision. This paper describes the extraction of image features from the raw images (gray value images), especially Forstner interest corner points. The mathematical model of the Forstner interest operator as well as the behavior in the presence of noise are investigated. Experiments with real images prove the feasibility of the Forstner interest operator in the field of Digital Photogrammetry.