Papers by Necla Uluğtekin
Landmark Orientation and Map Design for Pedestrians: Prototype of a Selcuk University Campus Area Pedestrian Navigation System
IOP Conference Series: Earth and Environmental Science, 2016
Orientation software produced today is generally designed for the navigation of cars. However, th... more Orientation software produced today is generally designed for the navigation of cars. However, the navigation needs of pedestrians are different from those of drivers. The aim of this study is the design of a cartographic interface that supports the navigation of pedestrians in unfamiliar areas using landmarks and evaluation of this geo-mobile application by usability testing. In this study, an approach to landmark orientation based on the Voronoi diagram is proposed. Furthermore, the developed mobile application that uses this approach is explained in detail. The results of user tests are also given.
Monitoring quality of vaccination services provided for aged 0-23 months children in Edirne: Using lot quality technique and geographic information systems during health care reform period
Monitoring Quality of Vaccination Services Provided for Aged 0-23 Months Children in Edirne Using... more Monitoring Quality of Vaccination Services Provided for Aged 0-23 Months Children in Edirne Using LQ Technique and GIS During Health Care Reform Period AIM: Aim of this study was to investigate the effect of this practition on the quality of vaccination services during Health Care Reform. MATERIAL AND METHOD: Research was conducted in a sample of 0-23 months children representing Edirne, by using Lot Quality Technique. Data collection were performed on December 2006, the beginning of health care reform pilot application, and February 2008, respectively. This is a cross-sectional study with the level of accuracy as ±5 and level of confidence as 95%. Sample size was 400 children. Concurrently, geographic information system technology was used for integrated evaluation of the data and for presentation of the results as thematic maps. FINDINGS AND RESULTS: The ratio of fully-vaccinated children according to age was 98% in 2006, and 75,1%, in 2008. The quality of the vaccination services...
A New-Lowcost Approach to National Statistical Electronic Atlas
Electronic atlases are becoming a new research field in cartography. Although some de- veloped co... more Electronic atlases are becoming a new research field in cartography. Although some de- veloped countries have created their own electronic atlases, there is no cartographic adequate electronic atlas in Turkey. In this article, a case study on an electronic statisti- cal atlas is reported. In Turkey, the statistical information is published annually in form of a yearbook by National Statistical Institution. This yearbook contains a large amount of tabular data that has spatial character, but a few thematic maps that are poor products in cartographic sense. The authors present the information in yearbook as an atlas that contains thematic and animated maps.
The Use of Remote Sensing and Gis Technologies for Evaluation of Turkish River Basins: A Case Study of Marmara River Basin and Istanbul
In this study, it was aimed at combining remote sensing (RS) technology and geographic informatio... more In this study, it was aimed at combining remote sensing (RS) technology and geographic information system (GIS) in order to determine sensitive river basins and specific areas, which need urgent planning activities, after providing a rather rapid, sensitive and comprehensive overview of the current situation of Turkish river basins in terms of existing spatial data. For the aim of the study, all tabular information gathered from the national authorities on regional basis was overlapped with the geometric data of Turkish river basins using maps being established in a GIS environment. As a result of GIS studies on the 26 Turkish basins, the Marmara Basin was selected as a model sensitive region and was studied in more detail by using 2000 dated Landsat 7 ETM image. Besides, Istanbul, the largest metropolitan of the Turkey and located in the Marmara Basin, was examined to determine the expansion of the settlement area in 16 years time period by using Landsat images dated 1984, 1992 and...
N. ULUGTEKİN, F. BEKTAS BALCİK, A. O. DOGRU, C. GOKSEL, I. ASLAN ALATON, D. ORHON, 2009, The Use of Remote Sensing and GIS Technologies for Evaluation of Turkish River Basins: A Case Study of Marmara River Basin and Istanbul, International Journal of Environment and Health: Part A , Vol. 44 No:1,...
International Journal of Environment and Health
Comparing Spatial Interpolation Methods for Mapping Meteorological Data in Turkey
Energy Systems and Management, 2015
Determining the potentials of the renewable energy sources provides realistic assumptions on usef... more Determining the potentials of the renewable energy sources provides realistic assumptions on useful utilization of the energy. Wind speed and solar radiation are the main meteorological data used in order to estimate renewable energy potential. Stated data is considered as point source data since it is collected at meteorological stations. However, meteorological data can only be significant when it is represented by surfaces. Spatial interpolation methods help to convert point source data into raster surfaces by estimating the missing values for the areas where data is not collected. Besides the purpose, the total number of data points, their location, and their distribution within the study area affect the accuracy of interpolation. This study aims to determine optimum spatial interpolation method for mapping meteorological data in northern part of Turkey. In this context, inverse distance weighted (IDW), kriging, radial basis, and natural neighbor interpolation methods were chosen to interpolate wind speed and solar radiation measurements in selected study area. The cross-validation technique was used to determine most efficient interpolation method. Additionally, accuracy of each interpolation method were compared by calculating the root-mean-square errors (RMSE). The results prove that the number of control points affects the accuracy of the interpolation. The second degree IDW (IDW2) interpolation method performs the best among the others. Thus, IDW2 was used for mapping meteorological data in northern Turkey.
Environmental Science & Policy, 2015
Integrated technology intervention for sustainable environment which is most fitted for the very ... more Integrated technology intervention for sustainable environment which is most fitted for the very remote rural community is Mini-Grid (fed by Hybrid Power Systems i.e. Hydro, Wind and Solar energy). The power generated from the Mini-Grid will help in empowerment in the planning process, development of ST community's requirement and last mile delivery of intervention. The same will lead to socioeconomic development by utilizing local resources of target communities. It is essential to develop the skill of the rural people in the areas of project. The awareness and training phase will help the rural people to know the need and necessity of technology interventions for renewable energy. The data survey and mapping involve the utilization of various tools for information assimilation. Major data can be collected through Primary sources with the help of structured questionnaire by sending survey team for door to door household survey. Additional information can also be collected from Secondary sources through discussions, literature review and database of past and running projects. Off-Grid electrification may be intervened in few Un-Electrified villages i.e. Patin, Kapu and Milli villages of Kurung Kumey district of Arunachal Pradesh, India for income generation and livelihood of the area.
Compilation of Digital Elevation Model for Turkey in 3-Arc-Second Resolution by Using SRTM Data Supported with Local Elevation Data
Lecture Notes in Geoinformation and Cartography, 2009
In February 2000, the Space Shuttle Endeavour of the Shuttle Radar Topography Mission (SRTM) la... more In February 2000, the Space Shuttle Endeavour of the Shuttle Radar Topography Mission (SRTM) launched by NASA collected elevation data by scanning the earth landmasses between ~60º north and south parallels. After this 11 days mission, the collected data were ...
A Spatial Analysis Of Aegean Sea Using Remotely Sensed Imagery and GIS Technology
The Aegean is a semi-closed sea that has unique geographical features and bears equal strategic, ... more The Aegean is a semi-closed sea that has unique geographical features and bears equal strategic, economic and political importance for two states, Turkey and Greece. These cardinal facts necessitate the establishment and maintenance of a delicate balance between the interests of the two countries in the Aegean Sea. The length of the coastline belongs two countries has been evaluated using different cartographic projections. The water area of Aegean Sea has also been computed. All digitised data was transformed into an equal-area projection surface. On this surface, the total water area of the sea was computed. Finally, true length and area values have been obtained. All this vector data was imported into UTM projection and AutoCAD MAP 2000 environment in order to have a base map data in different projections for GIS applications. 1.
An analysis of Aegean coastal line using remotely sensed imagery
ABSTRACT Determining the baseline around the Aegean Sea between Greece and Turkey has been a juri... more ABSTRACT Determining the baseline around the Aegean Sea between Greece and Turkey has been a juridical problem for years. The line, from which the outer limits of the State's territorial sea are measured, has been discussed and interpreted for years between those countries. In order to bring a reliable suggestion to this problem, the Aegean Coastline has been digitized from the satellite imagery covered this area. The satellite images used here are Landsat-MSS Images, with 80 m resolution. Other data sources are the 1: 50 000 topographic maps. The length of the coastlines belongs two countries has been evaluated. The areas of the islands and the water area of Aegean Sea have been also computed. The results, which can be used as reliable criterion for juridical discussions, are presented and discussed.
The traditional map design, however, is not completely suitable to be applied in the mobile devic... more The traditional map design, however, is not completely suitable to be applied in the mobile devices due to the limited capacities of these devices as the small display area. Therefore, map design for mobile devices needs different and special design considerations in addition to conventional cartographic methods. As mapmaking tools become more available and user friendly for non-cartographers due to advances in technology, the potential of producing poor quality maps increased. Poor quality maps can lead to poor decision making and misunderstanding of world reality. Good quality road maps have the potential to transform complex data into accessible, understandable, and convincing information. Therefore, this paper aims at designing better maps for effective display on mobile devices by summarizing some design issues and discussing on the evaluation of a national navigation product produced by non-cartographers.
Classification of Road Junctions Based on Multiple Representations: Adding Value by Introducing Algorithmic and Cartographic Approaches
In this study, car navigation is considered as the basic activity and the multiple representation... more In this study, car navigation is considered as the basic activity and the multiple representation approach for the production of the navigation maps is taken into account to derive road network data for different representation levels. In this context, road junctions, which are the most complicated parts of road networks, are classified considering two different approaches, an approach based on cartographic aspects and an approach based on algorithmic aspects. In the first approach, road junctions are classified according to their aspects at different representation levels. In this concept, three representation levels, which are derived from 1:5000 scaled base level, are used and representations of possible road junctions are structured according to characteristics of these levels. Finally, they are classified by considering their geometrical shapes in each level. In the second approach, road junctions are classified according to algorithmic concerns. Junctions are defined in matric...
Journal of International Medical Research, 2007
The quality of vaccination services provided for children aged 12-23 months was determined in dif... more The quality of vaccination services provided for children aged 12-23 months was determined in different districts of Istanbul, Turkey. Quality was assessed through a lot quality assurance sampling method, using data extracted from interviews conducted in 2001 with the mothers or carers of the children. Concurrently, geographic information system technology was used for integrated evaluation of the data from different lots and for presentation of the results as thematic maps. The results of this study helped to identify districts of the city in which vaccination services were below the expected level of quality and where an unacceptable number of children were not being fully vaccinated. Subsequent to this study, actions were taken by the agencies responsible to improve the coverage and quality of the vaccination services in these districts of Istanbul.
Use of a Geographic Information System in an Epidemiological Study of Measles in Istanbul
Journal of International Medical Research, 2007
A geographic information system was used in an epidemiological study of measles in Istanbul, Turk... more A geographic information system was used in an epidemiological study of measles in Istanbul, Turkey. The aim was to obtain more reliable results and to increase the facilities for spatial monitoring in epidemiological studies. The Gaziosmanpasa district of Istanbul was selected as it experiences the highest level of migration, and currently has the highest population growth rate of the city's districts. The epidemic distribution of measles was investigated on the basis of examination of 320 children. The number, geographical distribution, complications and time of measles outbreaks were analysed and represented in thematic maps (a small selection is shown in this paper). The results were evaluated and, in view of these results, new vaccination plans were arranged.
Use of Remotely Sensed Data for Analysis of Land-Use Change in a Highly Urbanized District of Mega City, Istanbul
Journal of Environmental Science and Health, Part A, 2006
The study forms an example on monitoring and understanding urban dynamics by using remotely sense... more The study forms an example on monitoring and understanding urban dynamics by using remotely sensed data. The selected region is a rapidly urbanizing district of the mega city Istanbul, Gaziosmanpasa, whose population has almost doubled between years 1990 and 2000. The significance of this district besides its urban sprawl is that 61% of its land lies within the boundaries of an important drinking water reservoir watershed of the mega city, the Alibeykoy Reservoir. The land-use/cover changes that has occurred in the years of 1987 and 2001 are analyzed by utilizing a variety of data sources including satellite images (Landsat TM image of September 1987 and Landsat ETM+ image of May 2001), aerial photographs, orthophoto maps, standard 1:25000 scale topographic maps, and various thematic maps together with ground survey. Land-use changes are analyzed on the basis of protection zones of the reservoir watershed and the conversion of bare land and forests to settlements are clearly observed despite the national regulation on watershed protection. The decline of forests within the protection zones was from 69% to 63.6% whereas the increase in settlements was from 0.8% to 3.9%. The associated impact of establishing new residential sites with insufficient infrastructure is then linked with the water quality of the reservoir that has already reached to Class III characteristics regarding the recently revised national legislation stating that any class exceeding Class II cannot be used as a drinking water supply that in turn, had consequences on regulating the water services such as upgrading the existing water treatment plant. The paper aims to help the managers, decision-makers and urban planners by informing them of the past and current land-use/cover changes, to influence the cessation of illegal urbanization through suitable decision-making and environmental policy that adhere to sustainable resource use.
Use of GIS in Epidemiology: A Case Study in Istanbul
Journal of Environmental Science and Health, Part A, 2006
In this study, the procedure of using GIS for tracking the distribution of measles in a district ... more In this study, the procedure of using GIS for tracking the distribution of measles in a district of Istanbul was performed. The aim of the study is to present the available questionnaire data, which were collected during the measles epidemic, by means of maps. The designed maps show the relation and the distribution of individual cases on time and spatiality. A database is designed according to the questionnaires. Geo-spatial distribution of measles cases was analyzed. The obtained results were discussed and presented.
The use of remote sensing and geographic information systems for the evaluation of river basins: A case study for Turkey, Marmara River Basin and Istanbul
Journal of Environmental Science and Health, Part A, 2009
Comparison of SRTM and 25K topographic maps in Turkey
… on Cartography and …, 2008
Topographic maps that show the shape of land surfaces of the Earth are derived from different dat... more Topographic maps that show the shape of land surfaces of the Earth are derived from different data sources depending on the map scale. National topographic maps with the scale of 1: 25 000 (25K maps) are used as the base topographic map set published by ...
SRTM data in Turkey: Void filling strategy and accuracy assessment
The 4th Middle East …, 2007
Satellite Images as a Cartographic Data Source for Mapping Purposes
… Symposium on Remote …
Page 1. 1 SATELLITE IMAGES AS A CARTOGRAPHIC DATA SOURCE FOR MAPPING PURPOSES İ.Öztuğ Bildirici, ... more Page 1. 1 SATELLITE IMAGES AS A CARTOGRAPHIC DATA SOURCE FOR MAPPING PURPOSES İ.Öztuğ Bildirici, Şinasi Kaya, Nebiye Musaoğlu, Necla Uluğtekin ITU Faculty of Civil Engineering, Department of Geodesy and Photogrammetry ...
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Papers by Necla Uluğtekin