QGIS Tips

Introduction

This page contains a brief introduction to the Quantum GIS software (QGIS). QGIS is a Free Open Source Software which for more information please see the QGIS website www.qgis.org/. The basics of QGIS, particularly with respect to TUFLOW modelling are described below, each of these has a separate page. If you have any suggestions to be included in these pages, please add them to the discussion page. Please add QGIS Suggestions Here!.

QGIS uses ArcGIS file formats for vector data, with data stored in shapefiles (.shp). QGIS, however, is able to read in MapInfo files directly. In the shapefiles, points, lines and regions are stored in separate files.
If you are using QGIS as your model development or result viewing environment we strongly recommend installing the TUFLOW QGIS Plugin. It includes numerous tools to increase workflow efficiency. It also includes powerful result viewing functionality via its TUFLOW Viewer.

Installation via OSGeo4W

QGIS can be installed through the OSGeo4W setup installer (Windows only). The benefit of this method is it allows the user to customise the installation, e.g. users can add additional Python libraries. It can also be subsequently run after the initial installation to upgrade QGIS to the latest version without the hassle of uninstalling the current version and then doing a full install of the latest version (the installer will only download and install relevant parts, overriding the current installation with the new version).

• Installing QGIS via OSGeo4W steps
  

Basics

In this section are some basic GIS functions that are regularly used in creating TUFLOW models in QGIS.

1. Webinar Link: QGIS Configuration and First Time User Tips for TUFLOW Modelling
2. Generic QGIS New User Tutorials
3. Setting Project Projection
4. Editing a Shapes Layer
5. Editing Attributes in QGIS
6. Importing a Grid
7. Create a Grid From Points

TUFLOW Viewer

TUFLOW Viewer is part of the QGIS TUFLOW plugin and used to view results of TUFLOW simulations in QGIS.

1. TUFLOW Viewer

Tips and Tricks

1. Relief Shading
2. Adding Google / Bing Aerials
3. Convert Lines to Points
4. Assigning Elevation to Points from a DEM Dataset
5. Rotate Label to Line
6. Export Raster to .asc for TUFLOW Input
7. Plot Grid Elevations Using Profile Tool
8. Update a Column
9. Extracting Cross Sections from a DEM into TUFLOW .csv format
10. Thematic Mapping (Symbology)
    
11. Creating a Google Earth KMZ file
12. Using OpenLayers Aerial Imagery
13. Change Attribute Data Type
14. Installation of QGIS Nightly Build
15. Troubleshooting QGIS Freeze on Start-up
16. Using QGIS to update an existing model originally built using MapInfo
17. 3D Animations

Useful QGIS plugins

1. TUFLOW QGIS plugin
2. Other Useful QGIS plugins for TUFLOW modelling
3. Error While Upgrading Plugin

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