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 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.

The aim of this study was to determine sensitive river basins and specific areas that urgently need planning activities for sustainable resource and environmental management. In this context, a combination of remote sensing (RS) and geographic information systems (GIS) were employed. For that purpose, a comprehensive overview of the current situation of Turkish river basins in terms of existing spatial data was provided and all tabular data gathered from the national authorities on regional basis was assessed in combination with the geometric data of Turkish river basins in a GIS environment. Considering the GIS studies that covered all 26 Turkish basins, the Marmara River Basin was selected as the model sensitive region and was studied in more detail by using 2000 dated Landsat 7 ETM mosaic satellite image. Results of this comprehensive study indicated that Istanbul, which is located in the basin under study and the largest metropolitan of Turkey, was determined as the most populated and urbanized area of the region. Istanbul was further examined to determine the expansion of urban areas over a time period of 16 years using Landsat images dated 1984, 1992 and 2000. Finally, interpretations were done by combining the demographic and statistical data on urban wastewater treatment plants to present the prevailing situation of the water treatment facilities in Istanbul. Our study not only delineated the importance of applying environmental policies correctly for the efficient installation and operation of urban wastewater treatment plants in Istanbul but also demonstrated that effective urban wastewater management is a nationwide problem in Turkey.

Üç boyutlu (3B) kent modellerinin yaygınlaşması, kentlere ilişkin mekânsal bilgilerin 3B olarak sunulmasını ve dolayısıyla kullanıcıların mekânsal algılarının artırılmasını mümkün hale getirmiştir. Bu bağlamda geliştirilen CityGML standardı ile birlikte geleneksel olarak haritalar için kullanılan ölçek kavramı yerine 3B mekânsal veriler için ayrıntı düzeyi (LoD- level of detail) kavramı kullanılmaya başlanmıştır. Böylelikle, farklı uygulama gereksinimlerine göre farklı ayrıntı düzeylerinde kent modellerinin üretimi için standartlar ortaya konmuştur. Bu çalışmada, hava LiDAR verileri kullanılarak İstanbul Tarihi Yarımada sınırları içerisinde yer alan Eminönü Meydanı ve çevresinin yüksek ayrıntı düzeyinde (LoD3) turistik amaçlı 3B kent modeli oluşturulmuştur. Model turistik amaçlı tasarlandığından, referans olarak seçilen yapıların bulunduğu bölge dışında kalan yapılar için 3B bina genelleştirme yöntemi kullanılarak bu yapıların ayrıntı düzeyi indirgenmiştir. Oyun motoru tabanlı yapılan sunumda, modelin OpenStreetMap (OSM) ile entegrasyonu sağlanarak kullanıcıların model içerisinde etkileşimli olarak gezerken konum ve adres bilgilerine ulaşmaları sağlanmış ve yapılara eklenen öznitelikler ile modelin bilgi içeriği zenginleştirilmiştir.