A GIS Approach Regarding Tourism Suitability of Wetland Areas of Romania

A GIS Approach Regarding Tourism Suitability of Wetland Areas of Romania

Author(s): Nicu Ciobotaru,Theodor Lupei,Lucian Laslo,Monica Matei,Madalina Boboc,Ana Maria Velcea,Gyorgy Deak / Language(s): English / Issue: 23/2017

Tourism suitability refers to a certain touristic potential development regarding an area; considering the natural environment resources; the existing infrastructure and the number of tourists that visit the area for a certain amount of time. Tourism suitability also indicates how tourism resources can be exploited in a given area. To determine tourism suitability of the wetlands a set of spatial and statistical data with various sources were used. In the purpose of creating a set of maps that can reflect the level of tourism suitability; there were used spatial and statistical data for every locality that has a wetland nearby; data such as: localities and wetland placement; transportation network; bird; fish and amphibian species distribution; accommodation; inhabitants; tourists. The results of the analysis offered a series of indicators for tourism activities such as wetland suitability per locality.

A Test Facility for Verification of Length Measurements

A Test Facility for Verification of Length Measurements

Author(s): Orthodoxia Arabatzi,Nikolaos Koyvas,Vassilios Pagounis,Maria Tsakiri / Language(s): English / Issue: 23/2017

This paper describes the design and measurement of an internal test facility for length measurements. The purpose of setting up this control baseline is mainly to verify precision instruments of a few millimeters such as geodetic total stations and laser scanner instruments for educational and research activities. The paper describes the measurement process for the baseline reference distances using an absolute laser tracker and the statistical results of the tests using the baseline for two proprietary total stations.

Acquiring and Processing of Field Information Based on UAV, GNSS and GIS Technologies

Acquiring and Processing of Field Information Based on UAV, GNSS and GIS Technologies

Author(s): Mihai Valentin Herbei,George Popescu,Adrian Smuleac,Alin Cosmin Popescu / Language(s): English / Issue: 23/2017

The present work consists in taking photogrammetric images with the help of the drones, making their mosaic and georeferencing of the orthophotoplan resulting in the national stereographic projection system 1970. The flight took place at the University of Agricultural Sciences and Veterinary Medicine of Banat, King Mihai I of Romania, in Timisoara. Also, 15 targets were measured in the 1970 stereographic projection, based on GNSS technology. To achieve these objectives, the following equipment was used: PHANTOM 4 ADVANCED drones, GPS GS08, the 15 targets as well as the ArcGIS, PIX4D, SKYCATCH (iOS) data processing software’s.

Actual Approaches on the Water Utilities Data Models

Actual Approaches on the Water Utilities Data Models

Author(s): Ana Cornelia Badea,Gheorghe Badea / Language(s): English / Issue: 24/2018

In November 2017 the Technical Normatives about producing spatial datasets on public utility networks was approved and published by National Agency of Cadastre and Land Registration. Romania has undertaken the implementation of INSPIRE, so identifying the best ways to put it into practice is an essential step in the application of these rules. Currently there are developed models for water and sewerage networks, designed both using company software and open source software solutions. From cadastral and urban management viewpoint, it is very important that the utility networks to be correctly and complexly modeled, justifying the importance of presented analysis. Its importance is due to the fact that utilities networks are fundamental parts of the smart city concept, being integrated with the cadastral information. The implementation of concepts that lead to 3D modeling of standards-compliant utilities networks, while also offering open-source access, is a top priority, including at international level. The present article aims to analyze these models by highlighting their current status and defining important aspects.

Adjustment of GNSS Permanent Stations Network MOLDPOS

Adjustment of GNSS Permanent Stations Network MOLDPOS

Author(s): Iuliana Constantinov,Vasile Chiriac / Language(s): English / Issue: 25/2018

The aim of this work is to analyze the GNSS measurements results at different periods of time in order to estimate the accuracy of GNSS network monitoring in Republic of Moldova and to describe the national position system MOLDPOS. The goals of this paper are: the analyze of position systems; analyze of GNSS bases processing methods; the study of GNSS measures processing software and the adjustment of permanent stations network and the comparative analysis of the results. The most important part of the work was achieved by using Leica Geo Office Software that allowed to calculate the GNSS permanent stations coordinates for 4 different periods of time with the help of which was possible to determinate the smallest average deviation from initial coordinates and to determinate the average square error both in altitude and plan, in this way it’s possible to find out which accuracy is the best from all periods of time. The achievements of this paper are: for 30 minutes with ±1 cm in plan and ±2.6 cm for altitude and is the best accuracy and the rest of the results are represented in the next way: 24 hours: in plan : ±0.9 cm and for altitude is ±3.4 cm; 60 minutes: in plan: ±1 cm and for altitude is ±2.7 cm; 15 minutes: in plan: ±1.6 cm and for altitude is ±3.5 cm;

An estimation of potential flood losses in the context of floodplain development changes using GIS

Author(s): Ewa Glosinska,Lukasz Lechowski / Language(s): English / Issue: 2/2013

This paper aims to define the amount of changes in potential flood losses on the basisof spatial distribution patterns of floodplain development using GIS tools. A procedurefor potential flood loss estimation has been developed in which GIS tools have beenapplied. A procedure for calculating flood losses applied in Polish legislation has beenused. According to this survey, in Gryfino, which is situated on the Odra river in years1996–2007 potential hazard of flood loss grew as a result of grow of floodplain areasdevelopment

An Overview on Space Time Cube Visualization in GIS

An Overview on Space Time Cube Visualization in GIS

Author(s): Ana Cornelia Badea,Gheorghe Badea / Language(s): English / Issue: 25/2018

Over the last years, the STC (Space Time Cube) visualization method has been analyzed in many scientific papers in the literature. The term STC cames from cartography, meaning a geographical representation where time is treated as the third dimension.This model was introduced by the Swedish geographer Hägerstrand at the end of the sixties. When datasets involve more than one dimension in addition to time are difficult to visualize. In a geovisualization environment, maps as digital representations are used to emphasize visual thinking about geospatial patterns, relationships, trends. Currently, GIS technology offers dedicated tools that lead to interesting viewing results using this method, the cube and its contents being automatically created from a database. We reviewed some functions on temporal data, used to view geospatial data sets in different ways. Also in the case study, an earthquake dataset was used, which was represented using the STC method, but also in the form of a temporal slider application.

Analiza dokładności określenia jednostkowej wartości nieruchomości metod korygowania ceny średniej

Author(s): Edward Sawilow / Language(s): Polish / Issue: 1-2/2006

The dissertation presents the basic rules of estimating the real estate using the method of correcting the average price. The pattern for estimating the real estate value by the method of correcting the average price into the lineal function of many variables has been transformed. The analysis of the precision of the method in relation to the precision achieved due to the lineal model of regression of multiple variables has been shown. The results confirm the smaller accuracy of estimating the real estate value using the method of correcting the average price in relation to the results from the model of linear regression of variables.

Analiza zjawiska autokorelacji przestrzennej cen transakcyjnych na rynku nieruchomości lokalowych

Author(s): Radoslaw Cellmer / Language(s): Polish / Issue: 1/2012

One of the most important factors influencing price and its effect on the value of real estate is location, which can be considered on both global and local scales. The result is that prices in a given location should be similar and they should show spatial auto-correlation. This paper deals with the essence of spatial autocorrelation and introduces a methodology of measuring spatial dependences. The results of the research concern housing prices in the vicinity of Olsztyn. For research purposes, global and local Morans and Getis-Ord indexes were used along with an analysis of semi-variograms. In this way, both the spatial autocorrelation and spatial differentiation of dependencies between housing prices were determined.

Analiza zmian pokrycia terenu wokół autostrad za pomocą metod GIS

Author(s): Lukasz Lechowski / Language(s): Polish / Issue: 2/2013

This article aims to develop a method of acquiring land cover changes data on the basis of high resolution orthophotography derived from Polish cartographic resources. The assessment of information sources was also examined in terms of its utility in such analysis. Simultaneously, using selected example, it was outlined, how the surrounding the A2 motorway area in the Stryków community had changed between the years 1996 and 2009. Some methods and tools applied in geoprocessing and spatial analyses were also presented. Many scientific publications describe data acquiring methods based on aerial photography and ortophotomaps that can be used in land cover and land use analyses. These methods may be divided into manual (visual), semi-automatic and automatic interpretation methods (e.g. raster, hybrid, object methods). In this survey the manual interpretation method was applied due to the input data accessibility e.g. ortophotomaps that were made only in the visible light spectrum with different tone colors and contrasts for each year (1996, 2004, 2009). This research involved following steps: (1) projecting of geodatabase structure, (2) visual interpretation of ortophotomaps in order to create land cover maps for 1996, 2004 and 2009, (3) delimitation of land cover changes, (4) survey results analysis with kernel density tool in order to present the density and direction of land cover changes in the neighbourhood of A2 motorway. The research indicated the straight majority of area surveyed in the years 1997–2009, was covered by gramineous vegetation and crops. However, the percentage of this class was decreasing systematically during those years. There was also remarkable increase for industrial and built-up areas. In the neighbourhood of A2 motorway in Stryków community, the growth of woodlands, wooded and shrubs area class was also noticed. For the building A2 motorway purposes there were created new gravel-pits and excavations of sand nearby the road. That is why for the area surveyed the percentage of greenfields was larger in 2009 than in 1996.

Analysis of Land Cover Changes Using Sentinel-1 Data. Case Study- Galati County, Romania

Analysis of Land Cover Changes Using Sentinel-1 Data. Case Study- Galati County, Romania

Author(s): Nicoleta Violeta Iurist,Florian Statescu,Cazarina Georgiana Bartic,Valeria Ersilia Oniga / Language(s): English / Issue: 23/2017

The study of land cover changes is very important to have proper planning and utilization of natural resources and their management. The aim of this paper is to classify the study area, for two different time periods and to analyses the change detection using free-of-charge Sentinel-1 data. For this case study, dual-polarization (VV+VH) Interferometric Wide swath mode (IW) data collected on August 16th 2017 and October 11st 2017, over South-Est of Romania, were used. Pre-processing and processing were conducted using ESA Sentinel-1 toolbox (S1TBX) in the Sentinel Application Platform provided by ESA. Data have been calibrated, terrain corrected, and classified using supervised classification. The training and test data have been collected from Sentinel- 2 images.

Analysis of the relationships between the spatial arrangement of palaeovalleys and contemporary valleys of Central Poland in the light of GIS methods

Author(s): Aleksander Szmidt / Language(s): English / Issue: 15/2016

W artykule przedstawiono przykład zastosowania wybranych metod GIS w celu wykazania związków pomiędzy przebiegiem dolin kopalnych oraz współczesnych na obszarze Polski Środkowej. Analizowany obszar w warunkach lądowych kształtowany był już w paleogenie i neogenie, natomiast największy wpływ na obecną rzeźbę powierzchni odcisnęły procesy morfogenetyczne w czwartorzędzie. W opracowaniach paleogeograficznych dla analizowanego obszaru często wskazuje się na możliwe zależności pomiędzy wykształceniem rzeźby współczesnej a jej podłożem, w szczególności zaś sieci dolinnej. W celu weryfikacji tej hipotezy, na podstawie archiwalnych materiałów kartograficznych oraz Cyfrowego Modelu Wysokościowego rzeźby współczesnej, zaproponowano schemat przeprowadzenia analizy z wykorzystaniem zestawu ogólnodostępnych narzędzi GIS. Z wyników przeprowadzonej analizy można stwierdzić, że główne doli- ny rzeczne Polski Środkowej w dużej części nawiązują swoim przebiegiem do kopalnej sieci dolinnej, gdzie związki te najlepiej są widoczne w przypadku dolin największych.

Areas Affected by Wildfires in Thasos Island using GIS

Areas Affected by Wildfires in Thasos Island using GIS

Author(s): Ana Cornelia Badea,Gheorghe Badea / Language(s): English / Issue: 22/2017

In this paper we want to highlight the areas affected by wildfires in Thasos using Esri technology. The study is based on images from before and after the event. GIS possibilities offer us the appropriate environment to develop the study. The workflow was created in ArcGIS Pro10.3, using Chain Function.

Around the Bloc: Ancient Monuments Mapped on Kazakh Steppe

Author(s): TOL TOL / Language(s): English / Issue: 11/10/2015

Giant designs traced out by earth mounds could be thousands of years old.

Aspecte privind conceptele şi practicile de planificare urbană integrată în Franţa

Author(s): Lilian Cîrnu / Language(s): Romanian / Publication Year: 0

Aspects Regarding External Stresses on Dams During the Years 2000 – 2016. Case Study – 22 Reservoirs in Prut – Bârlad Catchment

Aspects Regarding External Stresses on Dams During the Years 2000 – 2016. Case Study – 22 Reservoirs in Prut – Bârlad Catchment

Author(s): Isabela Balan,Loredana Crengani?,Flaviana Corduneanu / Language(s): English / Issue: 23/2017

The Prut - Barlad Water Basinal Administration has a complex program of observations and hydro meteorological measurements. For a number of 22 reservoirs, special behavior monitoring is carried out, according to the Normative for the Monitoring of Hydrotechnical Constructions NP 087-2003. The main external stresses monitored at the dams of these accumulations are: rainfall, temperatures, water level in the lake. A study period of 17 years between 1999 and 2016 was chosen for the analysis. The paper presents the multiannual evolution of the maximum water levels in the reservoirs chosen for the study.

Aspects Regarding Side Displacement and Deformation as Effect of the Subsidence Process Caused by the Exploitation of Mineral Underground Deposite

Aspects Regarding Side Displacement and Deformation as Effect of the Subsidence Process Caused by the Exploitation of Mineral Underground Deposite

Author(s): Raluca Farca?,Sanda Na?,Paul Sestra?,Cornel Arsene,Mircea Ortelecan / Language(s): English / Issue: 24/2018

This paper addresses two aspects related to the manifestation of the subsidence process on the surface, caused by the exploitation of deposits of useful mineral substances (coal, ores and salt), respectively the analysis of the functional - stochastic model used to determine the displacement and deformation parameters of the surface. Taken into account, was the subject of previous research by the authors. In order to determine the displacement parameters, the rigorously processed repeated measurement method was used.

Assessing accuracy of forest cover information on historical maps

Author(s): Urs Gimmi,Christian Ginzler,Matthias Müller,Achilleas Psomas / Language(s): English / Issue: 146/2016

Assessing the uncertainty of historical map information is a prerequisite for using this source type for land cover reconstructions. We assessed the accuracy of forest cover information from 1930 / 1940 Swiss topographic maps (Siegfried maps) by comparing them with forest cover gained from orthophotos and terrestrial photos from the same period. Orthophotos were considered to contain the true forest cover information and consequently inconsistencies between historical maps and orthophotos were considered as true errors (over or underestimation of the forest cover on the map ). Terrestrial photos reflect the surveyors perspective in the field and we therefore used this source type to develop hypotheses on potential reasons for inaccuracy of map information. Generalized linear models were used to test the hypotheses. The results confirmed our expectation that disagreement between maps is more likely to occur near forest edges, at higher altitudes and in less accessible and visible areas. Contrary to our expectations terrain slope did not play a significant role to explain surprisingly high rates of inaccuracy occurred in forest core areas.

Assessment of Hydromorphological and Hydrodynamic Alterations Caused by Anthropogenic Interventions on the Riverbed. Case Study Danube Bala Branch New Bottom Sill

Assessment of Hydromorphological and Hydrodynamic Alterations Caused by Anthropogenic Interventions on the Riverbed. Case Study Danube Bala Branch New Bottom Sill

Author(s): Constantin Cârstinoiu,Gyorgy Deak,Bogdan Uri?escu,Georgeta Tudor,Alina Florina Nicolae,Adrian ?tefan Zamfir,Tiberius Danalache,Marius Olteanu,Marius Raischi / Language(s): English / Issue: 23/2017

The necessity for navigation conditions improvement on the Lower Danube lead to the construction of a submerged bottom sill on the Bala branch. This paper presents differences that occurred between riverbed bathymetry and water current velocity values recorded in measurements campaigns using multibeam and ADCP techniques carried out before and after the bottom sill was built (June 2013 and March 2016). The comparative hydromorphological analysis showed the emergence of erosion areas up to -17.4 m and deposition areas up to 9.5 m. As for the hydrodynamic alterations, above the new built bottom sill, the water current velocity values of over 3.0 m/s were recorded.

Atlas Fontium

Author(s): Marek Slon / Language(s): English,Polish,German / Issue: 5/2017