Muhammed Oğuzhan METE, Doğuş GÜLER, Tahsin YOMRALIOĞLU

Açık Kaynak Kodlu Kütüphane İle 3B Web CBS Uygulaması Geliştirilmesi

Günümüzde internet sayesinde sınırlar ve engeller ortadan kalkmış ve bilgiye erişim kolay hale gelmiştir. Masaüstü uygulamalarnın yanısıra, tüm kullanıcılar tarafından anlık değişikliklerin görülebildiği web tabanlı uygulamaların sayısı gün geçtikçe artmaktadır. Mekânsal bilgilerin kullanıcılara sunulduğu çeşitli web tabanlı uygulamalar da yaygınlaşmaktadır. Açık kaynak kütüphanelerini kullanarak geliştiriciler amaca göre web uygulamaları geliştirebilmektedirler. Web tabanlı üç boyutlu (3B) görselleştirme, coğrafi bilgi sistemleri (CBS) uygulamalarında yaygın olarak kullanılan bir yöntemdir. Bu makalede, açık kaynaklı javascript kütüphanesi Cesium kullanılarak 3B web CBS uygulaması geliştirilmiştir. Web uygulamasında global, ülke ve şehir ölçeklerinde öznitelik bilgileri içeren vektör veri katmanları görselleştirilmiştir. Ayrıca en uygun yer seçimi ve CBS ile taşınmaz değerleme gibi farklı projeler sonucunda üretilen raster veri katmanları da üç boyutlu olarak görselleştirilmiştir. Kullanıcıların, farklı çalışmalardan elde edilen çıktı ürünlerine bilgisayarına ek bir yazılım veya eklenti kurmadan, web tarayıcısı üzerinden erişilebileceği vurgulanmaktadır.

DEVELOPMENT OF 3D WEB GIS APPLICATION WITH OPEN SOURCE LIBRARY

Today, thanks to the internet connection, the borders are disappearing and accessinginformation is more comfortable. Besides desktop applications, number of web-based applications whichinstant changes can be seen by all users are increasing day by day. The diversity of web-basedapplications that are currently used in presenting spatial information to users is also progressing. Usingopen source libraries, developers can develop web applications for their own purposes. Threedimensional (3D) visualization on the web is a commonly used approach in geographic informationsystems (GIS) applications. In this article, a 3D web application is developed using Cesium open sourcejavascript library. Vector data layers containing attribute data on global, country and city scales arevisualized on the web application. Moreover, raster data layers which produced in other projects likeGIS-based land valuation application is also visualized in three dimension. It is pointed out that theoutput products obtained from different studies can be accessed and visualized through the webbrowser without installing an additional program or add-ons on the users' computers.

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