The G4VIEW system is based on open source technologies and allows the dissemination and sharing of geographical information, also integrating third-party software products or platforms. The data are managed by robust and efficient database systems such as PostgreSQL supported by PostGIS as a spatial extension.
G4VIEW can operate both on the Internet and on the intranet and consists of three main components:

  • Servers and databases, where access and security are managed.
  • Web server exposed on the Internet that makes data available through the standard OGC services of Web Map Service (WMS) and Feature and Web Service (WFS), to each connected and authorized web client.
  • Web Client to expose the functionalities per user in relation to its profiling, for operations on data such as consultation, construction of new data, execution and update of the set in addition to the execution of spatial analysis, creation of printing maps, etc.webgis_02


Easy-to-use ergonomic user interface, map loading speed and query execution are just some of the system’s design priorities. The interaction with the client web interface generates requests to the server, which solves and returns the results to the client while managing numerous users and calls.


The high performance in the management of information, regardless of the number of information levels to be managed, the size of the geographical area and the number of elements in each layer. Its scalability allows the installation even on existing infrastructures no longer performing.


Every user has the tools useful for his activity, thanks to the possibility of integrating external modules and products for the production of data and reports. Customization features for map display, attribute settings, and query results create a highly productive work environment.


Data Types

G4VIEW manages different types of data, vector and editable, raster data such as satellite images, orthophotos and raster maps. It manages the metadata related to the data and services exposed and is able to manage large amounts of alphanumeric data organized in PostgreSQL or in other RDBMS that can be integrated thanks to its modular structure based on Open Source.


G4VIEW uses a local cache, managing data in different formats, either static or dynamic, optimizing the display regardless of the number of connected users. Access to the web server is reduced, avoiding the redundant transmission of data on the network. Some features are processed directly on the client, avoiding the overload of the web server.


Dynamic command bar, multi window, clear and intuitive navigation controls make the consultation pleasant and fast. Basic maps such as Google, OpenStreetMap and Bing, distance and area measurement tools, editing and queries make it an easy-to-use production tool even by less experienced staff.

Some WebGIS installation
Consortium of “bonifica” (reclamation), Delta del Po:

Nepi Municipality: