Book Image


Book Image


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)
About the Author
About the Reviewers
How OpenStreetMap Records Geographical Features

Using Osmosis with a database

So far, we've only used Osmosis to process OpenStreetMap data in local XML files. It can also read and write data to a database, which is more complex to set up, but faster for many operations. Setting up a database for the data can be complicated, but you only need to do it once.

Osmosis supports three types of databases:

  • PostGIS with a simple schema

  • The OpenStreetMap API schema on PostgreSQL

  • A legacy API schema on MySQL

We'll cover the first of these in this chapter. The second format is used when handling data on the OpenStreetMap servers, and isn't intended for use with any other system. The last format is no longer actively supported, as it isn't used on OpenStreetMap's servers any more, and you shouldn't use this format for new databases.

PostGIS ( is a version of the open source PostgreSQL database with geospatial extensions that allows you to retrieve geographic data, such as OpenStreetMap, efficiently. You can use PostGIS...