Journal of Geodesy, Cartography and Cadastre - No 8 / 2018
Integral issue here
Table of Contents (technical articles)
Geo-gravimetric Quasi-geoid Determination over Romania / Ileana Spiroiu, Radu-Dan-Nicolae Crisan, Cătălin Erhan, Neculai Avramiuc, Milută Fluieras, p. 6-11
Smart Managing Aeronautical Data / Sabina Plăvicheanu, Florin Nache, Petre Iuliu Dragomir, p. 12-14
The use of VGI in noise mapping / Efthimios Bakogiannis, Charalampos Kyriakidis, Maria Siti, Nikolaos Kougioumtzidis, Chryssy Potsiou, p. 16-25
Monitoring the vertical and horizontal displacements of the Poiana Mărului dam / Stănescu Roxana Augustina, Nache Florin, Păunescu Cornel, p. 26-30
Determination of altitudes by the trigonometric levelling with different refraction coefficients / Păunescu Cornel, Nache Florin, Stănescu Roxana Augustina, p. 32-36
Using methods for collecting data in the benefit of the local community / Andreea-Mădălina Geman, Andreea Luicianu, Mihaela Olteanu, Ana-Cornelia Badea, p. 38-42
Geo-gravimetric Quasi-geoid Determination over Romania
Ileana Spiroiu, Radu-Dan-Nicolae Crisan, Cătălin Erhan, Neculai Avramiuc, Milută Fluieras
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
The project of modelling a quasigeoid for the area of Romania will run in stages, based on the relative gravimetric measurements made on the area of every county, in gravimetric points from the 0, 1st and 2nd order gravimetric network, GNSS and precision leveling measured checkpoints and also new designed points (determined with GNSS/RTK). Remove-compute-restore algorithm will be used for compiling the geo-gravimetric quasigeoid, used prior in the pilot project of modelling a quasigeoid for Bucharest area and also the method of collocation/minimum curvature for generating the anomalies grid. In this article are presented the main activities that took place in the period 2016-2017 for creating the projects in the first counties of Romania and the results obtained till now as well as the perspective for the next years.
Keywords: gravimetric measurements, gravimetric network, modeling, quasigeoid
Entire article here
Smart Managing Aeronautical Data
Sabina Plăvicheanu, Florin Nache, Petre Iuliu Dragomir
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
This research study focuses on the individuality and complexity of aeronautical data, considering both acquisition and processing methods to be customized to this field. Aeronautical information is integrated into GIS environment that is designed for the needs of this industry, where standardization and interoperability are the key elements, data quality requirements are higher and accurate coordinates are essential for aeronautical safety. The goal is to design efficient database management systems, able to store, analyse, validate and manipulate spatial data, according to the applicable aeronautical regulations.
Keywords: Aeronautical data, GIS, Obstacle assessment, Interoperability
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The use of VGI in noise mapping
Efthimios Bakogiannis, Charalampos Kyriakidis, Maria Siti, Nikolaos Kougioumtzidis, Chryssy Potsiou
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
The quality of the soundscape in urban spaces is significant for the total environment of a sustainable city. However, limited attention has been given to the acoustic environment of a city by planners. In Greece, research on this issue and its representation at the city scale has been conducted only in a limited number of large cities whereas in most of the cities and towns there is no available data. The aim of this paper is to present an overview of a research about the monitoring of the urban acoustic environment affordably and reliably, and investigating the potential of VGI for such applications for typical mediumsized cities. This research is conducted as part of the ongoing Sustainable Urban Mobility Plans project (SUMPs), aiming to improve the urban landscape, increase quality of life and transform cities into more compact urban cores. Once the urban design characteristics are listed by the experts, audio recordings are collected through crowdsourcing (using smart phones and apps) in several city spots, according to a grid-based sampling methodology. Then, a sound map is created using an Ordinary Kriging technique in GIS, while finally the collected noise data are imported in OpenStreetMap (OSM) by the volunteers. The methodology was tested in two Greek medium-sized city centers (Kozani, and Drama). The soundscape data were then assessed by taking into consideration the European and national legislation about the urban acoustic environment as well as the various characteristics of each case-study area. As expected, results show that residents are exposed to high sound levels during the day. However, sound levels in carfree zones are considerably lower except from specific streets where motorcycles enter illegally (for delivery or freight purposes). In overall, this research proved that there is a p[potential of using crowdsourcing technique to collect noise data and monitor the soundscape reliably and affordably. It is crucial for the municipalities to activate citizens in participating to urban renewal projects in main streets as well as in vulnerable city areas (i.e. neighborhoods, school zones) in order to raise awareness about noise maps and create a better acoustic environment. Through these case studies, this paper points out that crowdsourced noise mapping may be utilized as a reliable tool for participatory planning. The paper provides considerations about how the proposed methodology may be further tested and improved.
Keywords: Sustainable mobility, urban planning, acoustic environment, soundscape mapping, ordinary kriging method, Open Street Map, VGI, crowdsourcing.
Entire article here
Monitoring the vertical and horizontal displacements of the Poiana Mărului dam
Stănescu Roxana Augustina, Nache Florin, Păunescu Cornel
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
This study presents the main steps that are needed in order to realise the monitoring of hydrotechnical constructions. The subject of this study is the Poiana Marului dam, situated on the BistraMarului River. The geometric levelling and also the microtriangulation and microtrilateration topographical measurements on the dam were made in two stages, at a six months interval. All these measurements represent the only external verification that emphasize, with a high accuracy level, the vertical and horizontal displacements that occur in the structure of the dam.
Keywords: Dam, Geometric Levelling, Altitude, Displacements
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Determination of altitudes by the trigonometric levelling with different refraction coefficients
Păunescu Cornel, Nache Florin, Stănescu Roxana Augustina
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
Currently, altitude determinations are made using the GNSS technology. It is known that this technology is tributary to the geoid model (quasigeoid). The altitude precision is not always very good for the intended purposes. The geometric levelling is often costly and requires quite a lot of staff. Trigonometric levelling on short distances may be an alternative for determining the altitudes with sufficient precision for most applications. The problem occurs when determining the refraction coefficient, which is usually considered constant. This paper presents a practical way of determining altitudes using the trigonometric levelling method.
Keywords: trigonometric levelling, refraction coefficient, altitude, precision.
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Using methods for collecting data in the benefit of the local community
Andreea-Mădălina Geman, Andreea Luicianu, Mihaela Olteanu, Ana-Cornelia Badea
Received: April 2016 / Accepted: September 2016 / Published: December 2017
Abstract
In this paper we are highlighting the benefits of creating and using forms for collecting data, through new applications possibilities regarding the main changes that can occur in the urban environment and suporting the local community. These forms can be accessed from mobile devices and the reported results can be analyzed using a desktop application. The users are able to send their location linked with attribute data. This approach can be successfullyused in a working team or can be disseminated for interested community members, as a crowdsource possibility. Crowdsourcing is evolving as a distributed way for solving different problems.The beneficiaries could be town halls or institutions with a key role in urban planning and utility companies.
Keywords: WebGIS, Local community, Crowdsourcing, Buildings, Urban Data, Environment
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