Book Image

OpenStreetMap

Book Image

OpenStreetMap

Overview of this book

Imagine being able to create accurate maps that look how you want them to, and use them on the Web or in print, for free. OpenStreetMap allows exactly that, with no restrictions on how or where you use your maps. OpenStreetMap is perfect for businesses that want to include maps on their website or in publications without paying high fees. With this book in hand you have the power to make, alter, and use this geographical data in a collaborative way from anywhere on the Earth.OpenStreetMap was started because most maps you think of as free actually have legal or technical restrictions on their use, holding back people from using them in creative, productive, or unexpected ways. This book will allow you to take control of your own maps and use them smoothly. This book introduces the reader to the OpenStreetMap project and shows you how to participate in the project, and make use of the data it provides. No prior knowledge of the project is assumed, and technical details are kept to a minimum.In this book, you'll learn how easy it is to add your neighborhood to OpenStreetMap using inexpensive GPS equipment, or even no GPS at all. You'll find out how to communicate with other mappers working in the same area, and where to find more information about how to map the world around you.Once you have your area mapped, you'll learn how to turn this information into maps, whether for use in print or online, large or small, and with the details you want shown. The book describes several rendering methods, each suited to different types of map, and takes you through a tutorial on each one.
Table of Contents (17 chapters)
OpenStreetMap
Credits
About the Author
About the Reviewers
Preface
4
How OpenStreetMap Records Geographical Features
Index

The extended API (XAPI)


In addition to the normal OpenStreetmap API, there is an extended API (XAPI) that gives you the ability to query OpenStreetMap data for particular sets of data. For instance, you can request data that has specific tags, covers a specific area, or is used in a particular combination of primitive elements. It's the most versatile way of getting customized sets of data from OpenStreetMap, and if you don't have the resources to set up a local copy of the OpenStreetMap database, XAPI is your next best way of getting the data you need.

XAPI doesn't run on the main OpenStreetMap servers, but instead on separate machines, so that the main servers aren't overloaded. There are several instances of XAPI running at present, each with different update frequencies, availability, and capacity.

A complete list of current XAPI servers is kept on the OpenStreetmap wiki at http://wiki.openstreetmap.org/wiki/XAPI, including details of how often they're updated from the main database. The...