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

Collecting information without a GPS


It's still possible to gather data for OpenStreetMap without a GPS receiver. Roads near your area may have been mapped by someone passing through the area, so will be missing any detailed information and points of interest. There are also areas where mappers have traced aerial images or out-of-copyright maps without surveying the area in person, so these areas will need details to be filled in.

You can identify areas that have been traced purely from aerial images using the NoName layer in the slippy map. This highlights any residential roads without a name, so any large blocks where all streets are highlighted are likely to have come from aerial images.

To go mapping without a GPS, you'll need a hard copy of the existing map of an area. You can print directly from the slippy map, but you'll get better results by using the Export facility to produce a PDF map of the area you're going to survey. We'll cover how to do this in Chapter 6. You can then print...