Results 21 to 30 of about 17,801 (223)

Some problems in using global positioning system in our conditions

open access: yesVojnotehnički Glasnik, 1997
The paper points out some problems in using GPS in true field conditions. In particular, the paper describes importance of having a very good state network and its connection with the European reference frame (EUREF).
Branko Božić
doaj   +1 more source

Datum Transformation with the Minimum Curvature Surface Interpolation Approach [PDF]

open access: yesEngineering and Technology Journal, 2015
This paper investigates main and important problem related to coordinates systems of Iraq. Maps of Iraq referenced to a local geodetic system while the technique oflocation observation and map production use the world geodetic system (WGS84) as a base ...
Ghydaa A. Abdul-Rehman   +1 more
doaj   +1 more source

2D Cadastral Coordinate Transformation using extreme learning machine technique [PDF]

open access: yesGeodesy and Cartography, 2018
Land surveyors, photogrammetrists, remote sensing engineers and professionals in the Earth sciences are often faced with the task of transferring coordinates from one geodetic datum into another to serve their desired purpose.
Yao Yevenyo Ziggah   +3 more
doaj   +1 more source

A priori sensitivity analysis for densification GPS networks and their capacities of crustal deformation monitoring: a real GPS network application [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2014
The main purpose of this study is to investigate the possibilities of monitoring crustal movement, during collective evaluation of first- and second-order GPS densification networks.
P. Küreç, H. Konak
doaj   +1 more source

User defined function for transformation of ellipsoidal coordinates [PDF]

open access: yesPodzemni Radovi, 2014
The topographic plane of the Earth has irregular shape, and for the purpose of mathematical defining, it is to be approximated by rotational ellipsoid. As local geodetic datum, rotational ellipsoids of various sizes are used in the world.
Ganić Aleksandar   +2 more
doaj   +1 more source

New Approaches for Evaluating Lidar-Derived Shoreline [PDF]

open access: yes, 2010
This study presents and compares two new methods of assessing the uncertainty of lidar-derived National Shoreline mapped by NOAA’s National Geodetic Survey: an empirical (ground-based) approach and a stochastic (Monte Carlo) approach.
Calder, Brian R.   +4 more
core   +2 more sources

A detailed quasigeoid model of the Hong Kong territories computed by applying a finite-element method of solving the oblique derivative boundary-value problem

open access: yesJournal of Geodetic Science, 2023
New gravity and precise levelling measurements have been performed throughout the Hong Kong territories to modernize a vertical geodetic datum that is currently realized by heights of levelling benchmarks defined in the Hong Kong Principal Datum (HKPD ...
Čunderlík Robert   +5 more
doaj   +1 more source

Establishment of Local Geodetic Nets [PDF]

open access: yesActa Montanistica Slovaca, 2009
Establishment of Local Geodetic Nets (LGN) is closely related to the compatibility of geodetic points and to their importance. It alsoinvolved with the processes of setting up 2D LGNs and methods of verifying the datum points´ compatibility in the net ...
Heidy Schwarczová   +4 more
doaj  

COORDINATE TRANSFORMATION USING FEATHERSTONE AND VANÍČEK PROPOSED APPROACH - A CASE STUDY OF GHANA GEODETIC REFERENCE NETWORK

open access: yesGeoplanning: Journal of Geomatics and Planning, 2017
Most developing countries like Ghana are yet to adopt the geocentric datum for its surveying and mapping purposes. It is well known and documented that non-geocentric datums based on its establishment have more distortions in height compared with ...
Yao Yevenyo Ziggah   +3 more
doaj   +1 more source

Implementation of CORS GNSS and local geoid for precise orthometric height determination in land subsidence region (a case study in Semarang City)

open access: yesJournal of Geospatial Information Science and Engineering, 2019
Geoid has an important role in converting geodetic heights to physical heights, both in orthometric height system and normal height systems. At present, Semarang City already has gravimetric geoid with centimeter-level precision.
Laode M Sabri
doaj   +1 more source

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