Journal of Geodesy, Cartography and Cadastre - No 6 / 2017
Integral issue here
Table of Contents (technical articles)
Experimental study regarding astro-geodetic vertical deviations / Georgiana Ancuța Căluță, Mirela Mădălina Trelia, Alexandra Ramona Sima, Lavinia Afrodita Călin, Octavian Bădescu, p. 6-14
Establishing of Directions in Plane and Error Value of the Horizontal Deformation Vector of the Constructions Corresponding to the Maximal Probability / Gheorghe Nistor, Cristian Onu, Irinel C-tin Greşiţă, Dan Pădure, p. 15-19
Some aspects of spatial data acquisition using total stations / Caius Didulescu, p. 20-23
Study of monitoring the river sediments / Radu Maxim, Valentin Danciu, Tiberiu Rus, Constantin Moldoveanu, p. 24-29
Informational System of Green Spaces using GIS / Elena Cerasela Toma, Ana Cornelia Badea, p. 30-34
Visualization of real objects using solid modelling / Crȋngaş Marius Daniel, Călin Alexandru, p. 35-40
Experimental study regarding astro-geodetic vertical deviations
Georgiana Ancuța Căluță, Mirela Mădălina Trelia, Alexandra Ramona Sima, Lavinia Afrodita Călin, Octavian Bădescu
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
The main goal of the present study consist in the evaluation of the vertical deviations obtained by visual astro-geodetic technique. Were performed five series of observations, both azimuthal and zenithal, in different nights by different observers. All angular measurements were visual effectuated with a high precision and motorized electronic total station and time measurements with a manual electronic chronometer. All observations was adjusted separately, first time in-block (azimuthal and zenithal measurements together) and second time only zenithal measurements. Finally, resulted vertical deviations components were inter-compared and also compared with similar values obtained by different methods and instruments. The study served mainly to check the variation of vertical deviations components and associate precision parameters at some measurements errors or modification of input data.
Keywords: Astro-geodesy, vertical deviations, geoid
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Establishing of Directions in Plane and Error Value of the Horizontal Deformation Vector of the Constructions Corresponding to the Maximal Probability
Gheorghe Nistor, Cristian Onu, Irinel C-tin Greşiţă, Dan Pădure
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
Operation of the deformations and horizontal displacements measuring of the studied constructions, called for short horizontal deformations construction, the principal geodesic method is represented by the microtriangulation method. Based of the cyclical angular and linear of precision measurement, performed from the fixed points of the network, in the frame of this method, the horizontal vector in the control points on the studied construction is determined. In this work, a method of estabilshing of the directions in plane and value of the error of the vector of the horizontal deformation of the studied construction corresponding to the maximal probability is presented.
Keywords: Vector, deformation, point, microtriangulation, error, maximal probability
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Some aspects of spatial data acquisition using total stations
Caius Didulescu
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
This article presents some aspects of measurement accuracy using total stations, regarding the correction of the measured acquired values, of mathematical corrections at the level of sensors involved and not least access to specific correction values.
Keywords: Spatial data acquisition, total stations, instrumental corrections
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Study of monitoring the river sediments
Radu Maxim, Valentin Danciu, Tiberiu Rus, Constantin Moldoveanu
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
This paper presents a study conducted during 2008-2014 on determining the volume of sediments accumulated on the Danube Delta - Cerrnovca arm.
For this purpose has been used various methods and programs, achieving different accurate bathymetric numerical models. The first bathymetric measurements in Romania, were made in 1829 by Russia, to the mouth of the Sulina arm.
Before that date, there were measurements attempts made by the Ottoman Empire and France. The main purpose of these measurements was to establish the best routes without danger between Tulcea and the Black Sea.
Subsequently, measurements were carried out to establish the plotting of new artificial canals and fishery purposes. Today, bathymetric measurements of the Danube Delta are mainly used for navigation purposes and geomorphologic research.
It is important to monitoring the river depths in order to know the bed dynamics and sediment distribution.
Keywords: MDT, Grid, triangulation Delaunay, Surfer, TIN, ArcMap, Global Mapper
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Informational System of Green Spaces using GIS
Elena Cerasela Toma, Ana Cornelia Badea
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
Many years ago Bucharest was considered the city of gardens. Today, in the XXIst century Bucharest encounters, like many other major cities of the world, many urban problems, which affect more and more the life quality of its inhabitants.
One of the great failures of Bucharest administration is linked with insufficient green spaces. It is a real "crisis" - which was accentuated after 1990 - when the "fever" of construction significantly reduced the "green" urban environment.
The purpose of this application is to create a basis for inventory of green spaces in the Lacul Tei Boulevard, which will be constituted as an informational GIS system. This database includes:
- The inventory of green areas with analysis and functional connections;
- Qualitative and quantitative description of vegetation;
- Highlighting the type of property and administration type.
The inventory will result in a proper management of green spaces with the potential implications on the quality and safety of life, ensuring the creation of a monitoring system of green spaces and degraded land. The advantage is that – based on this inventory – all these pieces of land can be recovered as green spaces, to ensure environmental quality, as well the health of the population.
Keywords: GIS analysis, informational system, green spaces, functional relationships, ArcGIS, spatial analysis, development
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Visualization of real objects using solid modelling
Crȋngaş Marius Daniel, Călin Alexandru
Received: April 2015 / Accepted: September 2016 / Published: August 2017
Abstract
3D modelling is the process of reconstructing the shape and dimensions of an object for further use and proccesing. The main technologies used in measuring include total stations, GNSS, imaging sensors, laser scanners or LiDar systems. By using close-range photogrammetry and the Photomodeler software we will present the steps for obtaining a 3D model of the Lutheran Church in Bucharest and will discuss the advantages and disadvantages of this method.
Keywords: Photogrammetry, Calibration, 3D Modelling, Photomodeler, Architecture
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