• Journal of Korean Society of Coastal and Ocean Engineers
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• v.14 no.1
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• pp.41-50
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• 2002

An attempt has been made to establish digital bathymetric and topographic database in the form of grid point value(GPV) with an interval of one-minute horizontal space fur a wide region of seas adjacent to Korean Peninsula and also with an interval of one-arcsecond for coastal seas of Korean Peninsula. Especially terrestrial and marine data fusion work using mean sea level as vertical datum plane has been performed for one-arcsecond GPV dataset. It is believed that the compiled bathymetric dataset are reliable comparing with existing dataset so for and can be utilized for ocean simulations of intermediate scale process and also detailed coastal inundation process.

• The Journal of the Korea Contents Association
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• v.7 no.11
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• pp.232-238
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• 2007

In this research, we constructed a 3D riverbed surveying system that is able to acquire the topographical information of a riverbed in real-time. The system consists of a RTK-GPS receiver and a echo sounder for collecting simultaneously the position and the water depth information of riverbed. A program for data composition and transformation was designed to generate the 3D coordinates by combining data of a GPS receiver and a echo sounder and made GIS database construction easy. We extracted TIN, digital elevation model and cross sectional maps of the riverbed by using GIS software from 3D data constructed through test surveying. It was shown that the accuracy of the result was RMS error of 0.069m when compared with the existing methods which use a total station and staffs. It is expected that the 3D riverbed surveying system wiil be able to be utilized to various surveying for water resources management in rivers, sea, dams, storing reservoirs and so forth.