Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, and user input are shown as follows: "Type a comma after $now, and enter 'dd/MM/yyyy' followed by a close parenthesis."

A block of code is set as follows:

CASE
WHEN "POP1996" > 5000000 THEN
  Result
ELSE
  "STATE_NAME"
END

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

CASE
WHEN "POP1996" > 5000000 THEN
  Result
ELSE
  "STATE_NAME"
END

Any command-line input or output is written as follows:

sudo apt-get install qgis-plugin-grass

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "You can explore the QGIS plugin ecosystem by navigating to Plugins | Manage and Install Plugins."