2. Materials and Methods This appli

2. Materials and Methods
This application was developed using geoserver which by Deoliveira [11] is an open source software server written in Java that allows users to share and edit ge ospatial data. GeoServer is the reference implementation of the Open Geospatial Consortium (OGC) Web Feature Service (WFS) and Web Coverage Service (WCS) standards, as well as a high performance certified compliant Web Map Service (WMS).The running Data Base Management System was PostgreSQL [12] using the extension Post GIS 2.0.0. PostGIS is an extension that adds support for geographic objects to the Post greSQL object-relational database. The dynamic maps were displayed by OpenLayers as provided at Opengeo [13] and by the server of the Hellenic Cadastre [14]. One of the running libraries was Geospatial Data Abstraction Library (GDAL), which is a translator library for raster geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation [15]. As a library, it presents a single abstract data model to the calling application for all supported formats. It also comes with a variety of useful commandline utilities for data translation and processing. Another library running is Cartographic Projection Library (PROJ.4) which converts the coordinates among different projection systems. The web site development took shape in ASP.NET MVC 4 [16] which is a framework for building scalable, standards-based web applications using well-established design patterns and the power of ASP.NET and the .NET Framework. At last for the database connection Entity Framework 5.0 was utilized which is a tool that enables point-and-click modification of a file.
The main philosophy of the developed GIS was the exploitation of a plant database containing all species requirements on a map screen using spatial data. In this way the administrator can digitize the urban and peri-urban forest and the spatial elements can automatically be followed by the variables that designate all species.
The development tools and the functions of this GIS application as result of this work are presented at the flow
chart of figure 1.