Difference between revisions of "QGIS Tips"

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=Introduction=
 
=Introduction=
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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 [http://www.qgis.org/ 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. [[Talk:QGIS_Tips | Please add QGIS Suggestions Here!]].
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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 [https://www.qgis.org/ 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. [[Talk:QGIS_Tips | 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.<br>
 
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.<br>
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If you are using QGIS as your model development or result viewing environment we strongly recommend installing the <u>[[TUFLOW_QGIS_Plugin| TUFLOW QGIS Plugin]]</u>. It includes numerous tools to increase workflow efficiency. It also includes powerful result viewing functionality via its <u>[[TUFLOW_Viewer | TUFLOW Viewer]]</u>.<br>
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<br>
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=Installation via OSGeo4W=
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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).<br>
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* <u>[[QGIS_Intallation_with_OSGeo4W | Installing QGIS via OSGeo4W steps]]</u><br>
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<br>
  
 
=Basics=
 
=Basics=
 
In this section are some basic GIS functions that are regularly used in creating TUFLOW models in QGIS.
 
In this section are some basic GIS functions that are regularly used in creating TUFLOW models in QGIS.
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# [[QGIS_Navigation | Navigation]]
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# <u>[https://www.youtube.com/watch?v=hL-jTI2OzcY&t=8s&index=28&list=PLC5821F2E43DDCB26 Webinar Link:  QGIS Configuration and First Time User Tips for TUFLOW Modelling]</u>
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# [[QGIS_Navigation | Generic QGIS New User Tutorials]]
 
# [[QGIS_Setting_Projection | Setting Project Projection]]
 
# [[QGIS_Setting_Projection | Setting Project Projection]]
 
# [[QGIS_Shape_Editing | Editing a Shapes Layer]]
 
# [[QGIS_Shape_Editing | Editing a Shapes Layer]]
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# [[QGIS_Table_Manager | Editing attributes with Table Manager Plugin]]
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# [[QGIS_Editing_Attributes | Editing Attributes in QGIS]]  
 
# [[QGIS_Importing_a_Grid | Importing a Grid]]
 
# [[QGIS_Importing_a_Grid | Importing a Grid]]
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# [[QGIS_Creating_a_Grid_from_Points | Create a grid from points]]
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# [[QGIS_Creating_a_Grid_from_Points | Create a Grid From Points]]
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<br>
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=TUFLOW Viewer=
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TUFLOW Viewer is part of the QGIS TUFLOW plugin and used to view results of TUFLOW simulations in QGIS.
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<ol>
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<li> [[TUFLOW_Viewer | TUFLOW Viewer]]
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</ol>
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<br>
  
 
=Tips and Tricks=
 
=Tips and Tricks=
 
# [[QGIS_Relief_Shading | Relief Shading]]
 
# [[QGIS_Relief_Shading | Relief Shading]]
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# [[QGIS_OpenLayers | Adding Google / Bing Aerials]]
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# [[QGIS_Aerial_Imagery | Adding Google / Bing Aerials]]
 
# [[QGIS_Convert_Lines_to_Points | Convert Lines to Points]]
 
# [[QGIS_Convert_Lines_to_Points | Convert Lines to Points]]
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# [[QGIS_Extract_Ground_Elevation | Assigning Elevation to Points from a DEM Dataset]]
 
# [[QGIS_Convert_Rotate_Label_to_Line | Rotate Label to Line]]
 
# [[QGIS_Convert_Rotate_Label_to_Line | Rotate Label to Line]]
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# [[QGIS_Export_Raster_to_asc | Export Raster to .asc for TUFLOW input ]]
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# [[QGIS_Export_Raster_to_asc | Export Raster to .asc for TUFLOW Input ]]
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# [[QGIS_Profile_Tool | Plot grid elevations using profile tool]]
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# [[QGIS_Profile_Tool | Plot Grid Elevations Using Profile Tool]]
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# [[QGIS_Update_Column_Values | Update a column]]
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# [[QGIS_Update_Column_Values | Update a Column]]
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# [[QGIS_Extract_CrossSections | Extract cross sections from DEM into TUFLOW .csv format]]
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# [[QGIS_Extract_CrossSections | Extracting Cross Sections from a DEM into TUFLOW .csv format]]
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# [[QGIS_Thematic_Mapping | Thematic mapping (Symbology)]]<br>
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# [[QGIS_Thematic_Mapping | Thematic Mapping (Symbology)]]<br>
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# [[QGIS_Creating_Google_Earth_KMZ | Creating a Google Earth KMZ file]]
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# [[QGIS_OpenLayers | Using OpenLayers Aerial Imagery]]
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# [[QGIS_Change_Attribute_Type | Change Attribute Data Type]]
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# [[QGIS_Nightly_(Dev)_Build | Installation of QGIS Nightly Build]]
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# [[Troubleshooting_QGIS_Freeze_on_Start-up | Troubleshooting QGIS Freeze on Start-up]]
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# [[QGIS_to_update_MapInfo_model | Using QGIS to update an existing model originally built using MapInfo]]
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<br>
  
 
=Useful QGIS plugins=
 
=Useful QGIS plugins=
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<ol>
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# [[TUFLOW_QGIS_Plugin | TUFLOW QGIS plugin ]]: The TUFLOW QGIS plugin has been created to help automate model development tasks, run TUFLOW internally within QGIS and view 1D results interactively.
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<li> [[TUFLOW_QGIS_Plugin | TUFLOW QGIS plugin ]]
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# [[View_Results_in_QGIS_with_Crayfish | Crayfish 2D Result Viewer]]: The Crayfish QGIS Plugin developed by Lutra Consulting provides a powerful 2D result viewing platform for TUFLOW.
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<li> [[QGIS_Useful_Plugins | Other Useful QGIS plugins for TUFLOW modelling]]</li>
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# [[QGIS_Useful_Plugins | Other Useful QGIS plugins for TUFLOW modelling]]<br>
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<li> [[TUFLOW_QGIS_Plugin#Error_While_Upgrading_Plugin | Error While Upgrading Plugin]]
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</ol>
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<br>
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{{Tips Navigation
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|uplink=[[Main_Page| Back to Main Page]]
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}}

Revision as of 10:05, 18 July 2024

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).


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


Useful QGIS plugins

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


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