A Database Management System in Real Estate Assessment

A Database Management System in Real Estate Assessment

Author(s): Voichița Roib / Language(s): English / Issue: 27/2019

The paper presents a database management system created for real estate assessment. The proposed database contains data taken from the real estate market, the characteristics of the traded real estate properties, their trading prices. It also contains property-specific data, with depersonalized information. The database management system was created using the Geographic Information System (GIS), offers information on traded or assessed real estate properties, leading to a better use of resources, can contribute to the creation of a real database needed for assessing real estate properties and can also help the assessor establish a reasonable market value of the property.

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,Mădălina 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 GIS Based Assessment of Renewable Energy Sources in Romania and Its Impact on Isolated Areas

A GIS Based Assessment of Renewable Energy Sources in Romania and Its Impact on Isolated Areas

Author(s): Casiana Marcu,Cristina Catita,Loredana Crengăniș,Florian Stătescu / Language(s): English / Issue: 20/2016

Taking into account the significant potential of renewable energy sources in Romania, it is reasonable to use it in order to develop Romanian cities and rural regions. There are some current technologies that may be applied to rural sustainable development, such as new-generation photovoltaic panels and systems of passive heating of water.This paper presents an application of Analytic Hierarchy Process for selection of renewable energy sources and technology in context of Central Region of Romania. The option – solar energy have been evaluated based on selected criteria. The objective of our working paper is to analyze the renewable energy development policy in isolated areas of Romania. Renewable sources of energy play an important part in the sustainable supply of energy and in the sustainable economic and social development.Using a GIS model, the aim is to demonstrate which of the analyzed sources of energy is the most convenient to be used in a sustainable system, solar or electric network.

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;

Advanced UAV Lidar System for Geospatial Data Collection

Advanced UAV Lidar System for Geospatial Data Collection

Author(s): Octavian Balotă,Daniela Iordan,Gabriel Popescu,Daniel Ilie / Language(s): English / Issue: 27/2019

There are presented 2 systems based on UAV equipment using a combination of 2 technologies Lidar and photogrammetry. Both UAV equipment, the hexacopter DJI M600 and the fix wing airplane TerraHawk CW-20 with vertical landing are collecting high density of Lidar points and aerial images.The paper presents the advantage of using high density of cloud points combined with high image resolution for collecting accurate and complete geospatial data. The registered area is divided in cells and specific algorithms are applied on cells in a tree structure for fast DTM and DSM generation. In house applications are used for cloud data processing and change detection. Some 3D modelling applications are also presented for different kind of objects.

Aerial Survey Test Project with DJI Phantom 3 Quadrocopter Drone

Aerial Survey Test Project with DJI Phantom 3 Quadrocopter Drone

Author(s): Tamás Jancsó,Peter Engler,Peter Udvardy / Language(s): English / Issue: 21/2016

The paper deals with the optimization of the aerial triangulation based on UAS images. The images were taken with a DJI Phantom 3 quadrocopter and they were measured in Photomod Lite ver. 4.4. The bundle adjustment was carried out twice; first in Photomod Solver and later in BINGO ver. 6.8. During the adjustment 14 ground control points were used and 31 points were calculated as new points. Using these new points we could compare the coordinates to the coordinates received from the high-precision field surveying measurements. From the coordinate differences the calculated RMS errors of horizontal coordinates are around one pixel size on the ground and to 2.5 pixels vertically. The final results showed us that a non-metric camera at low flight height with a quadrocopter can be used effectively and accurately at aerial surveys of relatively small areas.

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

Author(s): Ewa Głosińska,Łukasz 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 osiadania wybranych typów znaków osnowy geodezyjnej

Author(s): Łukasz Borowski,Agnieszka Lal,Krzysztof Nepelski / Language(s): Polish / Issue: 3/2017

The paper presents the studies of the possible causes of the excessive settlement of geodetic benchmarks. For the purpose of the study, two types of ground benchmarks (type 75a and b) were selected. The computational analysis was carried out on benchmarks situated in different soil conditions and under two variants of load. The parameters were modified in order to reach the interaction between the subsoil and the structure, which is the closest to the actual conditions. Obtained results were compared with the settlement noted in Kętrzyn district, during heights frame transformation from Kronsztadt’60 to Kronsztadt’86. As a result, possible change of heights of geodetic points between land surveying campaigns (circa 20 years) could be estimated.

Analiza dokładności określenia jednostkowej wartości nieruchomości metod korygowania ceny średniej

Author(s): Edward Sawiłow / 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): Radosław 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): Łukasz 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 Stătescu,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.

Application of UAV Technology (Drones) in Forest Cadastre

Application of UAV Technology (Drones) in Forest Cadastre

Author(s): Valeriu Seinic / Language(s): English / Issue: 27/2019

In the 21st century, technologies are not on the spot, as in all areas in cadastral activity, classical equipment is substituted by computer technologies equipped with different types of sensors that simplify the acquisition of field data and obtain Maps and cadastral plans.This article reflects the advantages of using unmanned aerial vehicles (UAV) in forest cadastral surveying. The advantage of UAV systems lies in their high flexibility and efficiency in capturing the surface of an area from a low flight altitude. In addition, further information such as orthoimages, elevation models and 3D objects can easily be gained from UAV images. The benefits of using UAVs in forest cadastral surveying and the new opportunities they offer for cadastral activity are impressive. Using photogrammetric materials obtained during flight with drone on Forest massif, CAD and GIS software develops extremely precise relief patterns. Elaboration of digital Orthophotoplans with high orientation accuracy, for the studied forestry area, using the materials obtained during the UAV survey, together with the resources of geographic information systems, allow the formation Structured information layers that can be overlapped. One of such layers overlapped an Orthophotoplan digital is the layer with cadastral boundaries. The results of this work are useful in the inventory of forest land, in land research, in clarifying land boundaries.

Applications of Fractal Geometry in Morpho-Hydrographic Network of the Danube Delta Potamology

Applications of Fractal Geometry in Morpho-Hydrographic Network of the Danube Delta Potamology

Author(s): Iulian Nichersu,Iuliana Nichersu,Marian Mierla / Language(s): English / Issue: 20/2016

Fractal geometry is a tool in the analysis and interpretation in Potamology. Delta, is a typical case of alluvial river that occurs at the mouth of the great rivers loaded with a large amount of silt and opens into smooth waters, usually saline (seas and oceans) which has shallow waters and a shelf extended where tides (in most of the cases) are of low intensity and where currents coastline, with different meanings are weak, allowing the appearance, submersible or on surface of bars or a flat surface cone of dejection on which the river it spreads its waters in a web of streams, canals and lakes.A fractal is a geometric entity which, in its spatial development, is multiplying more and more on a smaller scale. An essential characteristic of fractals is that if you look with a magnifying glass, any part thereof, is reproducing at a smaller scale, the figure of the whole fractal. Fractal Analysis of the mouths of the Danube show a particular hydromorphological dynamics with specific mechanisms important for the exchange of energy and matter.The high degree of complexity of the Danube course determines the occurrence of several degrees of freedom in the course of the bed, reflected in an intense development and decreased predictability.On the other hand, the fractal dimension analysis of morphologically homogeneous sections of the course, emphasizes the geometric homogeneity of the lower Danube by similar values thereof.As engineers and scientists, we have become aware that water management involves a holistic and integrated view of a number of distinct systems that would previously have been dealt separately, and consequently there is a need for collaboration with experts from a number of other disciplines. Also we have to take into account the requirement of a range of stakeholders who have a direct interest in Danube Delta ecosystems functions. We have to note the Danube Delta water circulation (DDWCS) system deal with very complex interactions that are not immediately apparent. Simulation modeling has therefore become an important tool in order to understand the behavior under changes to various boundary conditions or internal conditions, such as parameters or even functional representations of different identified phenomena.

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.