This wraps up our overview of the key concepts in the OpenLayers library. We took a quick look at the key components of the library from two different aspects—relationships and inheritance. With the
Map class as the central object of any OpenLayers application, we looked at its main relationships to other classes including views, layers, overlays, interactions, and controls. We briefly introduced each of these classes to give an overview of primary purpose. We then investigated inheritance related to these objects and reviewed the super classes that provide functionality to most classes in the OpenLayers library—the
Object classes. The
Observable class provides a basic event mechanism and the
Object class adds observable ...