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specific way of accomplishing tasks. With this system comes a set of terms that may not be obvious to everyone right away. Fortunately, the Drupal community has created an extensive, and growing, list of Drupal glossary terms on Drupal.org. The following are some highlighted ones with links that are most relevant to this book:

block

content type

contrib

core

entity

field

issue

module

node

taxonomy

theme

views

About the Authors

Alan Palazzolo is a Code for America fellow, and has been a big contributor to mapping modules, most notably OpenLayers. He maintains several Drupal modules and has been a featured speaker at Drupal events around the world. Alan led the first ever Code Review Sprint to review project applications at DrupalCon Chicago 2011.

Thomas Turnbull has been building websites in PHP since 2002, and working with Drupal since 2006. He has been an organizer for Drupal Camp New York, and has been contributor and maintainer for several Drupal modules. He has done Drupal development for Sony Music in New York, where he built sites for artists on their record labels using Drupal, and is currently working for Zagat, helping to migrate their website over to Drupal.

Table of Contents

Mapping with Drupal

Preface

Audience

Drupal and Mapping Glossary

Drupal 7 Modules

Conventions Used in This Book

Using Code Examples

Safari® Books Online

How to Contact Us

Acknowledgments

1. Why Map with Drupal

The Power of Maps

Story Telling

The Persuasion

Conversations in Maps

Why Use Maps

What Maps to Use

Further Resources

The Power of Drupal

Drupal as a CMS

Mapping in Drupal

2. Web Mapping Basics

Projections and Coordinate Systems

Map Projections

Spherical Mercator

More resources

Coordinate Systems

Longitude first

Data Storage

Data Types

Vector data

Vector data standards

Raster data

Databases

Challenges of Web-Based Mapping

Browser Capabilities

Client-side clustering

Library size

Tile rendering

Usability

3. Spatial Data

Data Storage

Database Layer in Drupal

Methods

Geofield

Location

Text fields

Geo

Data Input

Geofield Module

Basic configuration of Geofield

Adding geographic data to a node with Geofield

Location Module

Basic configuration of location

Adding geographic data to a node with the Location module

Extending the Location module with the GMap module

Geocoding

Modules

Geocoder and Addressfield

Other geocoding modules and services

4. Displaying Maps

Mapping with the OpenLayers Module

Basic Configuration of OpenLayers

Setting Up an OpenLayers Map

OpenLayers layers

OpenLayers Maps

Using Views to display an OpenLayers map

OpenLayers styles

Exploring OpenLayers Behaviors

Advanced OpenLayers Configuration

Creating an OpenLayers Map Layer from KML

Mapping with the GMap Module

Basic Configuration

Integrating with Views

Other Ways of Displaying Spatial Data

Spatial Data in Tables and Lists

Creating Feeds

5. Extending Map Interactions

GMap

Architecture

Geolocation Example

Creating the geolocation block

Add geolocation options to maps

Add JavaScript

Bind interactions to the map

OpenLayers

Architecture

Geolocation Example

Define Behavior

The Behavior plug-in object

JavaScript interactions

The final touch

Conclusion

6. Making Beautiful Maps

Markers

OpenLayers Styles

GMap Markers

Marker location

Add a marker

The .ini file

Regenerate marker cache

Data-Driven Styling

GMap Marker Handling

OpenLayers Attribute Replacement

The Map Interface

OpenLayers Module

Theming Pop Ups

GMap Theming

OpenLayers Theming

OpenLayers Pop Up Style

Map Tiles

Adding Base Layers to GMap

Adding