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QGIS / Lizmap / QGIS Server / PostGIS, The 3Liz tools


Manage and manipulate your geographic data with QGIS.

QGIS is an Open Source Desktop GIS (Geographic Information System) Software. The project was born in May 2002 and was created as a project on SourceForge in June of the same year. The community is working on creating GIS software (which is traditionally expensive proprietary software) simple, nice and easy to use and providing all common GIS features.

The initial goal of the project was to provide a GIS data viewer for the PostgreSQL / PostGIS database. QGIS has since reached a stage in its evolution where many are using it for their daily GIS needs. QGIS supports a large number of raster and vector formats. Its arichitecture allows the addition of business features through extensions.

QGIS is distributed under the GNU GPL (General Public License). This means that you can study and modify the source code, while having the guarantee of having access to an inexpensive and freely modifiable GIS program.

We have developed plugins for QGIS Desktop.

Create Web map applications with QGIS® and Lizmap.

Lizmap allows in QGIS® Desktop to create Web map applications.

These can be simple for the publication of a map intended for the general public in order to valorize geographic information, like the demonstration map of points of interest in the Lake Geneva watershed or flood risks in Montpellier.

They can integrate functions of creation and modification of data for a collaborative creation of geographical information, as for the map of demonstration of the faunistic observations in Polynesia.

It is also possible to integrate dedicated features like the Paris by night demonstration map.

Learn more or consult the documentation.

Check our hosting offer: Lizmap Hosting


We develop additional modules : Naturaliz, Cadastre, MapBuilder

QGIS Server

Publish your Web Geographic Services with QGIS and QGIS Server.

QGIS Server is a map server software exploiting the software core of the desktop GIS software QGIS . This link with QGIS provides the same capabilities for vector and raster data reads to QGIS Server as for QGIS.

The Open Geospatial Consoritum (OGC) defines the standards of the GIS sector. The OGC has defined certain standards for the Web Geographical Service that must be implemented by the geographic server software so that it is interoperable with each other and with the various desktop software or web constituting the GIS. The main OGC Web Services standards are the Web Mapping Service (WMS), the Web Feature Service (WFS) and the Web Corage Service (WCS).

QGIS Server is a mapping server that complies with the following Open Geospatial Consortium (OGC) standards: WMS 1.3.0 and 1.1.1, WFS 1.0.0 and WCS 1.0.0

We have developed Py-QGIS-Server to solve some real situations encountered in production environment: zero conf scalability, handle long-running request situation, auto restart...

We have also developed plugins for QGIS Server.

Geographical database

PostGIS is an extension of the PostgreSQL Database Management System (DBMS), which enables the manipulation of geographic (spatial) information in the form of geometries (points, lines, polygons), in accordance with the standards established by the Open Geospatial Consortium , and RASTER data. It allows PostgreSQL to be a spatial DBMS for use by geographic information systems.

The PostgreSQL / PostGIS database has a proven track record as a geographic data management system capable of supporting large volumes of data as well as meeting a significant query load. This database management system is for example used by the IGN to manage all the data produced and marketed by the Institute and by Mappy to exploit all the geographic data necessary for web services (map, traffic information, point of interest, course, etc).