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# The Definitive Guide to GTFS
*Consuming open public transportation data with the General Transit Feed
Specification*
Originally written by Quentin Zervaas.
## About This Book
This book is a comprehensive guide to GTFS -- the General Transit Feed
Specification. It is comprised of two main sections.
The first section describes what GTFS is and provides details about the
specification itself. In addition to this it also provides various
discussion points and things to consider for each of the files in the
specification.
The second section covers a number of topics that relate to actually
using GTFS feeds, such as how to calculate fares, how to search for
trips, how to optimize feed data and more.
This book is written for developers that are using transit data for web
sites, mobile applications and more. It aims to be as language-agnostic
as possible, but uses SQL to demonstrate concepts of extracting data
from a GTFS feed.
### About The Author
Quentin Zervaas is a software developer from Adelaide, Australia.
Quentin was the founder of TransitFeeds (now <OpenMobilityData.org>), a web
site that provides a comprehensive listing of public transportation data
available around the world. This site is referenced various times
throughout this book.
### Credits
First Edition. Published in February 2014.
**Technical Reviewer**
Rupert Hanson
**Copy Editor**
Miranda Little
**Disclaimer**
The information in this book is distributed on an "as is" basis, without
warranty. Although every precaution has been taken in the preparation of
this work, the author shall not be liable to any person or entity with
respect to any loss or damage caused or alleged to be caused directly or
indirectly by the information contained in this book.
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