Table of Contents for
OpenLayers 3.x Cookbook - Second Edition

Version ebook / Retour

Cover image for bash Cookbook, 2nd Edition OpenLayers 3.x Cookbook - Second Edition by Antonio Santiago Perez Published by Packt Publishing, 2016
  1. Cover
  2. Table of Contents
  3. OpenLayers 3.x Cookbook Second Edition
  4. OpenLayers 3.x Cookbook Second Edition
  5. Credits
  6. About the Authors
  7. About the Reviewer
  8. www.PacktPub.com
  9. Preface
  10. What you need for this book
  11. Who this book is for
  12. Sections
  13. Conventions
  14. Reader feedback
  15. Customer support
  16. 1. Web Mapping Basics
  17. Creating a simple fullscreen map
  18. Playing with the map's options
  19. Managing the map's stack layers
  20. Managing the map's controls
  21. Moving around the map view
  22. Restricting the map's extent
  23. 2. Adding Raster Layers
  24. Using Bing imagery
  25. Using OpenStreetMap imagery
  26. Adding WMS layers
  27. Changing the zoom effect
  28. Changing layer opacity
  29. Buffering the layer data to improve map navigation
  30. Creating an image layer
  31. Setting the tile size in WMS layers
  32. 3. Working with Vector Layers
  33. Adding a GML layer
  34. Adding a KML layer
  35. Creating features programmatically
  36. Exporting features as GeoJSON
  37. Reading and creating features from a WKT
  38. Using point features as markers
  39. Removing or cloning features using overlays
  40. Zooming to the extent of a layer
  41. Adding text labels to geometry points
  42. Adding features from a WFS server
  43. Using the cluster strategy
  44. Reading features directly using AJAX
  45. Creating a heat map
  46. 4. Working with Events
  47. Creating a side-by-side map comparator
  48. Implementing a work-in-progress indicator for map layers
  49. Listening for the vector layer features' events
  50. Listening for mouse or touch events
  51. Using the keyboard to pan or zoom
  52. 5. Adding Controls
  53. Adding and removing controls
  54. Working with geolocation
  55. Placing controls outside the map
  56. Drawing features across multiple vector layers
  57. Modifying features
  58. Measuring distances and areas
  59. Getting feature information from a data source
  60. Getting information from a WMS server
  61. 6. Styling Features
  62. Styling layers
  63. Styling features based on geometry type
  64. Styling based on feature attributes
  65. Styling interaction render intents
  66. Styling clustered features
  67. 7. Beyond the Basics
  68. Working with projections
  69. Creating a custom control
  70. Selecting features by dragging out a selection area
  71. Transitioning between weather forecast imagery
  72. Using the custom OpenLayers library build
  73. Drawing in freehand mode
  74. Modifying layer appearance
  75. Adding features to the vector layer by dragging and dropping them
  76. Making use of map permalinks
  77. Index

Chapter 2. Adding Raster Layers

In this chapter we will cover the following topics:

  • Using Bing imagery
  • Using OpenStreetMap imagery
  • Adding WMS layers
  • Changing the zoom effect
  • Changing layer opacity
  • Buffering the layer data to improve map navigation
  • Creating an image layer
  • Setting the tile size in WMS layers

Introduction

Imagery is one of the most important kinds of data to work with in a GIS system. An eye-catching map with beautiful cartography can make an immediate difference to the appeal of a mapping application.

This chapter is all about working with different types of raster layers. We have tried to summarize, with a set of recipes, the most common and important use cases you can find day to day when working with OpenLayers and third-party layer providers.

OpenLayers offers several classes to integrate with different imagery providers, from proprietary providers, such as Bing Maps, and MapQuest, to open source ones, such as OpenStreetMap, and Stamen, or even any Web Map Service (WMS) service provider.

The base class for any layer type is ol.layer.Base, which offers a set of common properties and defines the common behavior for other layer classes. The ol.layer.Layer class further extends the base class with some extra methods and creates sub-classes, such as ol.layer.Tile, which we'll frequently use during this chapter.

The layer itself is decoupled from the layer source. The base class for any layer source is ol.source.Source. This class is extended through other sub-classes, such as ol.source.Tile, and furthermore with ol.source.TileImage, which offers many sub-classes that lay the foundations for the raster layer sources that we'll be using in this chapter later on.

In addition to this, many layer sources inherit from the ol.source.XYZ class, which divides the layer into zoom levels. This way, each zoom level covers the same area but uses a greater set of tiles. For example, at level zero, a grid with one tile covers the whole world; at level one, a grid with four tiles covers the whole world; and so on. As we can see, on each level, the number of tiles and their resolution increases.

This chapter introduces you to some of the built in raster layers from OpenLayers, as well as taking a look at arbitrary WMS layers, and how to manage some common layer properties.