This presentation gives basic idea of plugins available in QGIS.

1. Plugins in QGIS and its uses
Mayuresh Padalkar

2. What is QGIS?
• QGIS is a professional GIS application which compares favorably with
free and commercial products. QGIS is built on top of and proud to be
itself Free and Open Source Software (FOSS).
• 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.

4. Plugins in QGIS
General plugins
1. Flow Estimator – Estimates flow for
trapezoidal and DEM channels
2. GEarthView – Displays QGIS view in
Google Earth
3. Qgis2threejs – 3D visualization
4. OpenLayers – Background maps
TUFLOW
1. Crayfish – Visualisation of TUFLOW
2D results
2. TUFLOW - Visualisation of TUFLOW
1D results
Vector
1.Swap XY – Swaps coordinates
2.Swap Vector Direction – Reverses the line direction
3.Rectangles Ovals Digitizing – Create rectangles, ovals and
ovals
4.QAD – AutoCAD like commands
5.Bulk vector export – Exports map contents
6. mmqgis – Geoprocessing
Raster
1. Georeferencer GDAL – georeferencing rasters
2. Freehand raster georeferencer – additional functions to
georeference
3. Point sampling tool – Extraction of point elevations
4. Zonal statistics plugin - Extraction of polygon elevations
5. Value tool – Displays values from various rasters
6. Profile tool – Plots terrain profile

5. Flow Estimator
• Helps to calculate flow and
velocity based on Manning’s
equation for uniform, steady flow
• Helpful to derive rating curve
• Capability to draw cross section
from DTM or user defined cross
section using txt/csv file

6. GEarthView
• Displays QGIS view and features
with attributes in Google Earth
• Similar to Google Earth
Connection utility in MapInfo

7. Qgis2threejs
• 3D visualization is possible
• Exports terrain data, image and
vector to web browser
• Flood extent can be identified if
water level is known (only integer
is accepted)

8. OpenLayers Plugin
• Google Maps, Bing Maps, etc. in
background
• Helpful to get a general idea while
analyzing and digitizing
• Similar to Basemaps in MapInfo

9. Crayfish
• It aspires to be a time explorer for
various grid and vector datasets
• Crayfish loads and renders results
directly rather than converting them
to GIS formats before viewing
• Ability to plot TS at any location,
create animation, export ASCII,
create contours and variety of things
• User-friendly
• Similar to WaterRIDE, SMS, Flood
Modeller Pro

10. TUFLOW (TuPlot)
• Easy to compare various options
in a single click of a pipe or node
• Ability to add secondary axis
• Legends can be easily shifted to
any corner
• Pleasant appearance
• LS can be easily plotted
• Similar to “Graph Selected TS
Items” in miTools (MapInfo)

11. Swap XY
• Swaps coordinates of vector layers
i.e. (x,y) to (y,x)

12. Swap vector direction
• Reverses the line direction of a
vector
• Similar to Reverse Line Direction
in MapInfo (MapCAD)
• Tip: Perform the action in editing
mode

13. Rectangles Ovals Digitizing
• Create rectangles, circles and
ovals
• Options to create rectangles,
squares and circles through map
extent and from centre and rotate
it eventually if needed
• Useful when buildings are square
or rectangle in shape

14. QAD
• Same functions as available in
AutoCAD
• Advanced options over Rectangles
Ovals Digitizing
• Nothing more to say I guess…

15. Bulk vector export
• Exports map contents to specified
format and CRS
• Only checked layers are exported
• Useful while submitting specific
layers during final delivery
• Formats supported are dxf, csv,
tab, shp, kml, pdf, etc.
• Similar to Universal Translator in
MapInfo but a bit different

16. MMQGIS
• Alternative to processing toolbox
• Some additional functions are
available like merging different
layers, converting geometry,
deleting duplicate geometries,
buffering, csv input/output/join,
etc.
• Not so used frequently but still
important

17. Georeferencer GDAL
• Similar to Register in MapInfo and
Georeferencing in ArcMAP

18. Freehand raster georeferencer
• Similar to Georeferencing toolbar
buttons in ArcMAP

19. Point Sampling Tool
• It collects raster values from
multiple layers of points
• Similar to Point Inspection tool in
Vertical Mapper (MapInfo)

20. Zonal statistics plugin
• It collects raster values from
polygon
• Similar to Region Inspection tool
in Vertical Mapper (MapInfo)

21. Value Tool
• Displays values from various
rasters
• Useful while comparing depths of
various options, scenarios, return
periods, etc.
• No buffering time as compared to
MapInfo
• Similar to Grid Info in Vertical
Mapper

22. Profile Tool
• Plots terrain profile from raster
layers or point vector layer with
elevation
• Helps to choose critical storm
duration by plotting rather than
zooming in and viewing it one by
one
• Shows the exact location on map
• Ability to copy and paste the data
with coordinates in excel
• Ability to save the graph as an image
• Similar to Cross Section in Vertical
Mapper

23. Useful links
• http://www.qgis.org/en/site/index.html
• http://monde-geospatial.com/arcgis-vs-qgis-10-most-important-
differences-between-arcgis-and-
qgis/?lipi=urn%3Ali%3Apage%3Ad_flagship3_search_srp_content%3
BnUhRd323TbiV%2B5vZ8OL57w%3D%3D
• https://wiki.tuflow.com/index.php?title=QGIS_Useful_Plugins
• Experience of colleagues and senior modellers
• Google

24. Thank You!!!
Any Questions???