Book Image

QGIS Blueprints

By : Ben Mearns
Book Image

QGIS Blueprints

By: Ben Mearns

Overview of this book

Table of Contents (14 chapters)
QGIS Blueprints
About the Author
About the Reviewers

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