Results 71 to 80 of about 285 (165)
Revista Facultad de Ingeniería Universidad de Antioquia, 2014 The best way to determine the height of dams is to level the top of the dam applying a geometric leveling, nevertheless this task is very demanding and expensive. The accuracy potential of LiDAR data has significantly improved, these systems can provide
Rubén Martínez Marín +2 more
doaj +1 more source
CORRECTION TO HELMERT'S ORTHOMETRIC HEIGHT DUE TO ACTUAL LATERAL VARIATION OF TOPOGRAPHICAL DENSITY
Revista Brasileira de Cartografia, 2009 Helmert (1890) used Poincaré-Prey's gravity gradient for the definition of the orthometric height. According to this approach the gravity value needed for the evaluation of the height is obtained from the observed gravity at the earth surface reduced to ...
Robert Tenzer, Petr Vaníček
doaj
Nova GeodesiaOrthometric heights are vital for fields such as topographic mapping, construction, engineering, and geophysical studies. This study examines the performance of five Global Geopotential Models (GGMs) and Global Navigation Satellite System (GNSS) data in
Herbert TATA, Clementina Ajibola OLAOYE
doaj +1 more source
Determining the new height of Mount Qomolangma based on the International Height Reference System
Geo-spatial Information ScienceTo achieve the goal that China and Nepal jointly announce the new height of Mount Qomolangma (MQ), the campaign of Qomolangma Height Survey (QHS) was carried out from 2019 to 2020.
Yamin Dang +6 more
doaj +1 more source
Geodesy and Cartography, 2016 The aim of this study is to analyze the best fitting geoid model for an arbitrary selected area of investigation. The Digital Finite Element Height Reference Surface (DFHRS) method, developed by Hochschule Karlsruhe has been chosen to define the height ...
Perparim Ameti, Reiner Jager
doaj +1 more source
DFHRS-based computation of quasi-geoid of Latvia
Geodesy and Cartography, 2013 In geodesy, civil engineering and related fields high accuracy coordinate determination is needed, for that reason GNSS technologies plays important role.
Inese Janpaule +4 more
doaj +1 more source
Geodesy and Cartography, 2017 The dedicated gravity satellite missions, in particular the GRACE (Gravity Recovery and Climate Experiment) mission launched in 2002, provide unique data for studying temporal variations of mass distribution in the Earth’s system, and thereby, the ...
Godah Walyeldeen +2 more
doaj +1 more source
Consistent determination of the gravimetric geoid and orthometric height
Journal of GeodesyAbstract Various computational methods have been developed and applied to determine regional gravimetric geoid models with high accuracy using surface gravity and terrain data, while also often taking into consideration topographic mass density information.
Robert Tenzer, Pavel Novák
openaire +1 more source
E3S Web of Conferences, 2018 Gunung Kidul regency is one of the regencies in Indonesia that almost every year (often) is susceptible to drought, there is an even in term of synonymous with a drought in the province.
Budhie Wijatna Agus +1 more
doaj +1 more source
Development of a gravimetric geoid model and a comparative study
Geodesy and Cartography, 2016 Site specific geoid model is prerequisite for accurate determination of orthometric heights. No geoid model has been developed so far for India or any of its part.
Upendra Nath Mishra, Jayanta Kumar Ghosh
doaj +1 more source