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QGIS:Becoming a GIS Power User

You're reading from   QGIS:Becoming a GIS Power User Master data management, visualization, and spatial analysis techniques in QGIS and become a GIS power user

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Product type Course
Published in Feb 2017
Publisher Packt
ISBN-13 9781788299725
Length 819 pages
Edition 1st Edition
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Authors (4):
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Anita Graser Anita Graser
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Anita Graser
Víctor Olaya Ferrero Víctor Olaya Ferrero
Author Profile Icon Víctor Olaya Ferrero
Víctor Olaya Ferrero
Alex Mandel Alex Mandel
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Alex Mandel
Ben Mearns Ben Mearns
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Ben Mearns
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Toc

Chapter 3. Discovering Physical Relationships

In this chapter, we will create an application for a raster physical modeling example. First, we'll use a raster analysis to model the physical conditions for some basic hydrological analysis. Next, we'll redo these steps using a model automation tool. Then, we will attach the raster values to the vector objects for an efficient lookup in a web application. Finally, we will use a cloud platform to enable a dynamic query from the client-side application code. We will take a look at an environmental planning case, providing capabilities for stakeholders to discover the upstream toxic sites.

In this chapter, we will cover the following topics:

  • Hydrological modeling
  • Workflow automation with graphical models
  • Spatial relationships for a performant access to information
  • The NNJoin plugin
  • The CartoDB cloud platform
  • Leaflet SQLQueries using an external API:CartoDB

Hydrological modeling

The behavior of water is closely tied with the characteristics...

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