Book Image

OpenLayers 2.10 Beginner's Guide

Book Image

OpenLayers 2.10 Beginner's Guide

Overview of this book

Table of Contents (18 chapters)
OpenLayers 2.10
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Configuring layer options


Let's take a look at a couple of the layer's options argument we passed in during the previous example.

Tip

Pay close attention to the commas. Both arguments and key:value pairs are separated by a comma, but make sure you do not have a comma after the last pair. Trailing commas will usually break your map and are usually a pain to debug—so if your map isn't working and you don't see any helpful error messages in Firebug, check for trailing commas. A great site to help with your code is http://jslint.com.

wms_state_lines layer options

This layer's options are:

{ displayInLayerSwitcher: false, minScale: 13841995.078125}

The first property, displayInLayerSwitcher , can be either true or false, and determines if the layer will appear in the layer switcher control (if there is a layer switcher control). In our example, we do have a layer switcher control and you'll notice that we don't see it in the list of layers. The layer is still there, and we can programmatically turn...