Using the QGIS

About QGIS

QGIS is a user friendly Open Source Geographic Information System (GIS) licensed under the GNU General Public License. QGIS is an official project of the Open Source Geospatial Foundation (OSGeo). It runs on Linux, Unix, Mac OSX, Windows and Android and supports numerous vector, raster, and database formats and functionalities.

Features

QGIS provides a continously growing number of capabilities provided by core functions and plugins. You can visualize, manage, edit, analyse data, and compose printable maps. Get a first impression with a more detailed feature list.

Supporting Organizations

QGIS is a volunteer driven project. We welcome contributions in the form of code contributions, bug fixes, bug reports, contributed documentation, advocacy and supporting other users on our mailing lists and gis.stackexchange.com. If you are interested in actively supporting the project, you can find more information under the development menu and on the QGIS Wiki. We also welcome financial contributions in the form of sponsoring and funding.

source:http://www.qgis.org/en/site/about/index.html

Using the QGIS Browser

QGIS comes with a standalone application called QGIS Browser. This is a useful companion tool to QGIS and helpful in managing GIS datasets. ArcGIS users may think of it as an application similar to ArcCatalog.

Locating the QGIS Browser

QGIS Browser Standalone Application

QGIS Browser is part of the standard install of QGIS.

  • Windows: If you installed QGIS via OSGEO4W installer, you will see QGIS Browser in your start menu.

  • Mac: The application is located at QGIS.app/Contents/MacOS/bin/QGIS Browser.app. You can create a symlink to this app. Navigate to the Application folder, right-click the QGIS icon and select Show Package Contents. Browse to MacOS ‣ bin ‣ QGIS Browser. Right-click the QGIS Browser icon and select Make Alias. Drag the QGIS Browser alias to the Applications folder. Now you can access the QGIS Browser like any other application.

  • Linux: You can launch the QGIS browser by the command qbrowser. It is located in the same directory as the qgis application.

../_images/a.png

Browser Panel in QGIS

A convenient way to access the QGIS Browser is from within the main QGIS Desktop application itself. The browser panel is located at the bottom of the left-hand panel in QGIS. Click on the Browser tab to open the QGIS Browser. If you do not see the Browser tab, enable it by doing to View ‣ Panels ‣ Browser (Windows and Mac) or Settings ‣ Panels ‣ Browser (Linux).

../_images/b.png

Procedure

Now let us explore some features of the QGIS Browser. Switch to the standalone QGIS Browser application. Browse to a directory on your system where you have some GIS data. You will immediately notice the advantage of using the Browser. Instead of seeing all support files and non-spatial data, you see only the spatial layers that are supported by QGIS. Click on a layer to select it.

../_images/1109.png

                       source:http://www.qgistutorials.com/en/docs/using_qgis_browser.html

                                                              QGIS TUTORIAL 

                  

EXPORT from CAD to Google Earth, Shapefiles

What is new in the ‘Professional’ edition (AutoCAD/BricsCAD)

Basically the new edition adds to the existing editions (Basic and Standard), and their importing functionality, the possibility of exporting from AutoCAD or BricsCAD drawings to Google Earth (KML or KMZ), Shapefiles (SHP), Points (many formats), MapInfo, PostGIS, SQL Server, SQLite, and many more geospatial targets (see here the full data provider list)

The new function exports objects from the drawing to spatial files or databases, and saves their Extended Entity Data (EED/XDATA) as data tables using a wizard, which shares some of the steps with the import wizard. In the same way, the user can choose or select the export parameters to define all the target data among a large number of possibilities

There are options for filtering the objects when exporting, and all the geometric operations required to fit the target data format are automatically performed

Moreover this edition adds more possibilities of manipulating databases directly from the application, such as creating new schemas or tables, deleting or renaming schemas and tables, etc.

Now EXPORT from CAD to Google Earth, Shapefiles, etc.

Transformation of coordinates

The application will calculate geometric transformations of the objects in line with the export processes, which will depend on the chosen Coordinate System (CRS) for the source (drawing) and target data

As in the import processes, the user can choose the appropriate CRSs from a complete CRS catalog or from a list which includes the most recent used CRSs

Data providers

The application uses its own data providers in the export processes (as in the import processes) and offers the user a wide range of settings to fit the best configuration for the outgoing data

Export function features

· Select the objects to be exported: choose between exporting the selected objects, the objects in a layer or the whole drawing
· Automatic complex geometric operations: review and editing of the selected objects in order to export geometries accommodated to the target format, such as the polygonal segmentation on curves if required
· Option to treat the closed polylines as polygons: most of the time the closed polylines represent polygonal elements on the target data format and this conversion can be automatic
· Filtering of incompatible objects: there are a few object types not supported by the export processes (such as complex 3D objects), which are automatically filtered. The filter result is displayed before exporting

Some Export function video samples:

· Directly to Google Earth (KML) from your drawing
** AutoCAD: Video 1
** BricsCAD: Video 1
· Coordinates to Excel from your drawing
** AutoCAD: Video 2
** BricsCAD: Video 2
· Import a Shapefile and export it as 3D Google Earth
** AutoCAD: Video 3
** BricsCAD: Video 3
· OpenStreetMap data. Edit and export to Google Earth
** AutoCAD: Video 4
** BricsCAD: Video 4
· Import a Shapefile. Edit & export as Shapefile
** AutoCAD: Video 5
** BricsCAD: Video 5

source:http://www.spatialmanager.com/now-export-from-cad-to-google-earth-shapefiles-etc/