Author Topic: Quantum GIS (QGIS) is a user friendly Open Source Geographic Information System  (Read 2409 times)

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Quantum GIS (QGIS) is a powerful and user friendly Open Source Geographic Information System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports vector, raster, and database formats. QGIS is licensed under the GNU Public License.

Quantum GIS (QGIS) is a powerful and user friendly Open Source Geographic Information System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports vector, raster, and database formats. QGIS is licensed under the GNU Public License.

The name Quantum GIS really has no siginificance, other than it starts with a Q and QGIS uses the excellent Qt Toolkit from Nokia (formerly trolltech).
A Brief History

The Quantum GIS project was officially born in May of 2002 when coding began. The idea was conceived in February 2002 when Gary Sherman began looking for a GIS viewer for Linux that was fast and supported a wide range of data stores. That, coupled with an interest in coding a GIS application led to the creation of the project. In the beginning Quantum GIS was established as a project on SourceForge in June 2002. The first code was checked into CVS on SourceForge on Saturday July 6, 2002, and the first, mostly non-functioning release came on July 19, 2002. The first release supported only PostGIS layers.

QGIS Features

QGIS is a cross-platform (Linux, Windows, Mac) open source Geographic Information system.

The QGIS project offers different applications for your use cases:

    QGIS Desktop -  The classic QGIS desktop application offers many GIS functions for data viewing, editing, and analysis.
    QGIS Browser - A fast and easy data viewer for your local, network and online (WMS) data.
    QGIS Server - A standard-compliant WMS 1.3 server that can be easily configured using QGIS Desktop project files.
    QGIS Client - A web front-end for your web mapping needs based on OpenLayers and GeoExt.

QGIS Desktop

The major features include:

    Direct viewing of vector and raster data in different formats and projections. Supported formats include:
        PostGIS and SpatiaLite,
        most vector formats supported by the OGR library, including ESRI shapefiles, MapInfo, SDTS and GML.
        raster formats supported by the GDAL library*, such as digital elevation models, aerial photography or landsat imagery,
        GRASS locations and mapsets,
        online spatial data served as OGC-compliant WMS , WMS-C (Tile cache), WFS and WFS-T

    Mapping and interactive exploration of spatial data. Tools include:
        on-the-fly reprojection
        print composer
        overview panel
        spatial bookmarks
        identify/select features
        edit/view/search attributes
        feature labeling
        vector diagram overlay
        advanced vector and raster symbology
        graticule layer
        map decorations like north arrow, scale bar and copyright label

    Create, edit and export spatial data using:
        digitizing tools for vector features
        field and raster calculator
        the georeferencer plugin
        GPS tools to import and export GPX format, convert other GPS formats to GPX, or down/upload directly to a GPS unit

    Perform spatial analysis, including:
        map algebra
        terrain analysis
        hydrologic modeling
        network analysis
        and many others

    Publish your map on the internet using QGIS Server or the "Export to Mapfile" capability (requires UMN MapServer)

    Adapt QGIS to your needs through the extensible plugin architecture.

QGIS Browser

QGIS Browser is a simple and fast data viewer. It allows the user to explore attribute and meta data of local and online source.

QGIS Server

QGIS Server currently offers WMS 1.3.0 and 1.1.1 implementation. Features include:

    Enhanced WMS (Web Map Service) via HTTP GET. Supports GetCapabilities, GetMap, GetStyle, GetFeatureInfo and custom styling with Styled Layer Descriptor (Supported standards: WMS 1.3.0, WMS 1.1.1, and SLD 1.0.0).
    SOAP via HTTP POST. Compatible with the ORCHESTRA and SANY Service Oriented Architecture.
    Native configuration with SLD. User friendly map symbolisation using QGIS Desktop.
    Cartographic extensions to SLD (diagrams, patterns and custom symbols with Scalable Vector Graphics). Exchange of cartographic rules with the GetStyle operation.

The QGIS mapserver is a FastCGI/CGI application written in C++. It works together with a webserver (Apache in most cases) invoking the FastCGI application. It uses QGIS as backend for the GIS logic and for map rendering.

Supported plattforms include Linux, Windows XP (only CGI at the moment) and MacOSX. Other Unixes possible, but not tested.

QGIS mapserver is an open source program released under the GPL license.

Installation instructions are provided on the QGIS Wiki.

QGIS Client

Learn more about QGIS

Quantum GIS provides a continously growing number of capabilities provided by core functions and plugins. You can visualize, manage, edit, analyse data, and compose printable maps.


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