QGIS Short Introduction

Download and Installation

Download QGIS version 2.18. Do not install version 3 because it does not support all the plugins written for version 2 which you will need.


  1. Menu bar
  2. Tool bar
  3. Panels
  4. Map view
  5. Status bar
For a more detailed list of the QGIS GUI functions see the link below:



Install key plugins

DB Manager
Gdal Tools
GEarth View
Georeferencer GDAL
Lat Lon Tools
OpenLayers Plugin
OSMDownloader
Raster Terrain Analysis plugin
Spatial Query plugin
XyTools

QGIS Project Properties

CRS - Coordinate Reference System

When you work with a GIS application like QGIS or ArcGIS one of the most important parameter you need is to decide on the CRS of your project on QGIS.  You would normally work in a projected coordinate like UTM WGS84 in the zone your project is in.

Note: if you add Google Earth web map with OpenLayersPlugin your project CRS will be automatically changed to WGS84 Pseudo Mercator. QGIS has an reproject 'On the Fly' option which with automatically convert your project CRS to Pseudo Mercator.


EPSG - European Petroleum Survey Group

All CRS projections are assigned an EPSG code which can be used in GIS applications to automatically assign the projection to the map. The EPSG code for WGS84 Pseudo Mercator is 3857. The code for WGS84 UTM Zone 48 is 32648 (Ulaanbaatar). The code for WGS84 UTM Zone 50 is 32650 (Choibalsan).

Layers Panel

Set Layer CRS


Set CRS from Layer

You can select the layer you want from the Layer Panel and change the Project CRS by selecting Set CRS from Layer when you right click on the layer you want to use.

Open Attribute Table

You can open the Attribute Table by right clicking on the layer in the Layer Panel and selecting the Open Attribute Table option.  The results will be displayed.


Layers Property Styles


Menu Options

Layer

Create Layer


Add Layer


Plugins


Vector


Raster


Web - Google Satellite


Digitizing GeoData - New Shape File




GeoReferencer

See Raster above

Print Composer




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