A New Approach to Layer Models at Web based Geographical Information Systems
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Internet, which covers all the network of information systems have changed the direction of digital communication with various communication protocols. Unquestionably these new innovations in information technologies affect Geographical Information Systems (GIS). Thus; GIS databases used to be shared and carried with compact discs but now with the help of desktop GIS (DGIS) applications can be shared more easily. On the other hand web based GIS (WebGIS) applications are able to reach their databases at servers with different internet protocols. This allows mobile users to access easily; as a result popularity of WebGIS has recently increased. WebGIS applications are able to share data requested by mobile users via HyperText Transfer Protocol (http) with the help of its dynamic content. This has caused the need for a different layer model and a work that shows compilation degree. This study explains how DIV layers are constructed with Hyper Text Markup Language (HTML) and laminated with Style sheet (CSS) codes. In this study it is explained how created layer will be shown on the place that we want of the x,y level, also the codes that are used to present with dynamic content with Active Server Pages (ASP) web programming language are explained. Sharing of the codes that are used in this simple application is not only important for avoiding dependence to GIS programs which are the monopoly but also for introduction of DIV layer model that is tried in WebGIS applications for the first time. Therefore, the obtained results will be helpful to researchers.
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