building a connection in qgis with postgres sql

WHAT IS QGIS?

Quantum GIS (often abbreviated to QGIS) is a free

software desktop Geographic Information Systems (GIS) application that

provides data viewing, editing, and analysis capabilities.

Gary Sherman began development of Quantum GIS in early 2002, and

it became an incubator project of the Open Source Geospatial

Foundation in 2004. Version 1.0 was released in January 2009.

Quantum GIS is written in C++, and its GUI uses the Qt library.

Quantum GIS allows integration of plug-in developed using either C++

or Python.

WHAT IS QGIS?

Quantum GIS is a multi-platform application and runs on

different operating systems including Mac OS

X, Linux, UNIX, and Microsoft Windows.

Quantum GIS has a small file size compared to

commercial GIS's and requires lessRAM and processing

power; hence it can be used on older hardware or running

simultaneously with other applications where CPU power

may be limited.

WHAT IS QGIS?

Quantum GIS is continually maintained by an active group

of volunteer developers who regularly release updates and

bug fixes. Currently, developers have converted Quantum

GIS into 31 languages and the application is used

internationally in academic and professional environments.

HOW IT WORK WITH POSTGRESQL

AFTER THE INSTALLATION OF BOTH POSTGRESQL

AND QGIS SOFTWARE, WE NEED I=ONE MORE THING

THAT IS POSTGIS FOR POSTGRESQL SPECIFIED

VERSION.

POSTGIS ACTUALLY A PLUG-IN OR WE CAN SAY IT AN

EXTENSION FOR POSTGRE THAT MAKE IT A “SPATIAL

DATABASE”.

HOW IT WORK WITH POSTGRESQL

FOR USING QGIS WITH POSTGRES WE MUST NEED

INSTALLATION OF POSTGIS.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGIS

We Simply

Open Our Qgis

Software.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGIS

FOR BUILDING A DATA

BASE CONNECTION OR

TO CONNECT WITH

POSTGRESQL/POSTGIS,

WE HAVE TO CLICK “ADD

POSTGIS LAYER” BUTTON

FROM MANAGE LAYER

BUTTON.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGISAfter This “Add Postgis

Table” A Dialouge Box Will

Prompt.

We Can Connect To Our

Database By Making a New

Connection, If We Already

Have a Connection Then We

Can Edit or Delete as Well.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGIS

For Creating A New

Connection, We Have

To Fill All The Mention

Parameters.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGIS

We fill all the

requirement as

shown in the

image.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGISAfter making a successful

connection when we connect

or database, we will able to

see our data, if we have

added to that specified

database.

BUILDING A DATA BASE CONNECTION WITH POSTGRE/POSTGIS

Data

Displayed In

Qgis Interface.

This is all for the data retrieval from data base if we have already added some data.

ADDING DATA TO DATABASE

FOR ADDING DATA WE

WILL USE “IMPORT

SHAPEFILES TO

POSTGRESQL” SPIT TOOL

IN PLUGN-IN TOOL BAR.

ADDING DATA TO DATABASE

YOU CAN SIMPLY ADD

THIS TOOL TO PLUGN –N

TOOL BAR BY FOLLOWING

THESE STEPS.

ADDING DATA TO DATABASE

Here We Define Our

Data Cnnection To

Data First, After

Cionnecting To

Database We Simply

Add Our Data From

Our Local Drive, And

Then Press Ok.

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