Chapter 9. Other Tips and Tricks

In this chapter, we will cover the following:

• Creating tiles from a QGIS map

• Adding a layer to geojson.io

• Rendering map layers based on rules

• Creating a layer-definition file

• Using NULL values in PyQGIS

• Using generators for layer queries

• Using alpha values to show data density

• Using the __geo_interface__ protocol

• Getting the output file names from processing algorithms

• Generating points along a line

• Using expression-based labels

• Creating dynamic forms in QGIS

• Calculating the length for all selected lines

• Using a different status bar CRS than the map

• Creating HTML labels in QGIS

• Using OpenStreetMap points of interest in QGIS

• Changing the QGIS web proxy

• Running QGIS scripts as scheduled tasks

• Visualizing data in 3D with WebGL

• Visualizing data on a globe

• Make a globe-like azimuthal orthographic projection

• Animating a layer