Evaluating geoportals

Download
index.pdf
2014
Con, Eren
Show full item record
276
views
171
downloads
The idea of sharing data is the most important element for geographic information infrastructure, data standards and quality. To achieve this; building spatial data infrastructure, sharing and the presentation of the data concepts are available throughout the world. Following the production of data, there are specific standards such as ISO TC/211, INSPIRE and OGC to define rules and procedures of data sharing. Following the production of the data within certain standards, it is important to reach the data through a "door, gate"-like state of the environment. At this point, the portal architecture and technology are essential to respond to this need. It is important that predefined data can be shared through a single interface. Moreover; this sharing environment should have certain standards in order to respond specific needs and to work more efficiently. On the other hand; recent technological developments require improvements in the existing Geoportals and addition of new features. Sustainability of the Geoportal can be achieved by providing the fundamental features, by adapting to technological developments and by consideration of responses to user expectations. In this thesis; Geoportal components are evaluated via a survey by employees in public sector, private sector and academia in Turkey. According to survey results; national and international standards, selection and visualization data on map interfaces are considered to be the most significant features. In this context, this study aims to define the importance of Geoportal components in line with technical perspectives, analysis of world examples, international approaches on spatial features and users’ evaluations.
Geographic information systems., Geodatabases., Geospatial data.
http://etd.lib.metu.edu.tr/upload/12617811/index.pdf
https://hdl.handle.net/11511/23878
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Development of GIS-based national hydrography dataset, sub-basin boundaries, and water quality/quantity data analysis system for Turkey
Girgin, Serkan; Usul, Nurünnisa; Akyürek, Zuhal; Department of Geodetic and Geographical Information Technologies (2003)
Computerized data visualization and analysis tools, especially Geographic Information Systems (GIS), constitute an important part of today̕s water resources development and management studies. In order to obtain satisfactory results from such tools, accurate and comprehensive hydrography datasets are needed that include both spatial and hydrologic information on surface water resources and watersheds. If present, such datasets may support many applications, such as hydrologic and environmental modeling, imp...
Weighted multi-visibility analysis on directional paths
Şeker, Çağıl; Toprak, Vedat; Department of Geodetic and Geographical Information Technologies (2010)
Visibility analysis is an important GIS tool that is used in a diverse array of disciplines ranging from earth sciences to telecommunications. Multi-visibility, as a cumulative type of visibility, combines many point-to-point results into a multi-value array. Points, lines, or areas can be used as sources or targets; and the combined values can be calculated in both ways. Through multi-visibility, a special 2.5D visibility value surface can be constructed over a digital elevation model. The effectiveness of...
An Embedded spatial statistics toolbox (R techniques) in open source GİS software (uDig)
Çavur, Mahmut; Düzgün, H. Şebnem; Department of Geodetic and Geographical Information Technologies (2016)
It is widely considered that geographic information systems (GIS) should include more spatial data analysis (SDA) techniques. The issues of which techniques should be included and how statistical analysis can be integrated with GIS are still widely debated. However, the typical software does not include all geospatial techniques. In this respect, this thesis focuses on the means to develop a framework which implements R spatial statistical techniques in the uDig GIS so that GIS and spatial statistical analy...
Hierarchical land use and land cover classification of Sentinel 2-a images and its use for corine system
Demirkan, Doğa Çağdaş; Akyürek, Sevda Zuhal; Koz, Alper; Department of Geodetic and Geographical Information Technologies (2017)
The aim of this thesis is to investigate the potential of Sentinel-2 satellite for land use and land cover mapping. The commonly known supervised classification algorithms, support vector machines (SVMs) and maximum likelihood classification, are adopted for investigation along with a hierarchical classification model CORINE. The main classes for land cover and mapping are selected as water, vegetation, built-up and bare-land in the first level, which is followed by inland water, marine water, forest/meadow...
Context based interoperability to support infrastructure management in municipalities
Tufan, Emrah; Akyürek, Sevda Zuhal; Oğuztüzün, Mehmet Halit S.; Department of Geodetic and Geographical Information Technologies (2010)
Interoperability between Geographic Information System (GIS) of different infrastructure companies is still a problem to be handled. Infrastructure companies deal with many operations as a part of their daily routine such as a regular maintenance, or sometimes they deal with unexpected situations such as a malfunction due to natural event, like a flood or an earthquake. These situations may affect all companies and affected infrastructure companies response to these effects. Responses may result in conseque...
Citation Formats
E. Con, “Evaluating geoportals,” M.S. - Master of Science, Middle East Technical University, 2014.
METU IIS - Integrated Information Service open@metu.edu.tr