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Figure 2: Screenshot of the Geothopica WebGIS
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| Figure 2: Screenshot of the Geothopica WebGIS.
The WebGIS currently allows you to work up to scale 1:950,000. A pop-up window, containing key information registries, appears when clicking on the chosen spring or well. Thematic maps related to the databases can be selected from the TOC. The coordinates are expressed in decimal degrees and projected using the WGS84 reference system. This portal is a useful tool for those projects that are carrying out research on geothermal energy and CO2 storage. However, the access to data through the WebGIS is in progress and it will be expanded in the future as some data is private and not accessible. Another relevant example is given by PVGIS for solar energy and PV installations. This application has been developed for all the European countries. The website, thus the related WebGIS, maps and databases are maintained up to date by the European Commission with the general aim at enhancing public access to information about its initiatives and European Union policies. The database of solar radiation was created from climatologic data homogenized for Europe and available in the European Solar Radiation Atlas using GRASS GIS modules, for example, r.sun (details on the methodology are available at http://re.jrc.ec.europa.eu/pvgis/solres/solrespvgis.htm and http://re.jrc.ec.europa.eu/pvgis/solres/solres.htm). The web interface consists of four parts: (1) solar irradiation data, (2) solar irradiance data, (3) solar electricity and (4) PV per regions. The web applications have been written almost exclusively using server-side scripting using PHP, with a few supporting programs written in C/C++. Furthermore, maps for single countries are also available (downloadable). An example of the view of the related WebGIS is given in figure 3. 
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