content: /**
   * This package contains classes for drawing images from map data. Drawing
   * commands are send to a <code>UnifiedImageBuilder</code> which abstracts
   * from the concrete graphics framework being used.
   * <p>Renderers are responsible for controlling the drawing process. Here,
   * a renderer is implemented as a visitor. It can be provided as parameter
   * to {@link aimax.osm.data.OsmMap#visitEntities(aimax.osm.data.EntityVisitor, aimax.osm.data.BoundingBox, float)}.   
   * <code>AbstractEntityRenderer</code> defines the general renderer interface
   * and contains some common attributes. The <code>DefaultEntityRenderer</code>
   * gives an example for a concrete implementation. The mapping between
   * types of map entities and symbols for visualization is done by
   * entity classifiers. They contain rules which assign <code>EntityViewInfo</code>
   * objects to map entities depending on its attributes. See the
   * <code>MapStyleFactory</code> for examples. Entity classifies are
   * maintained by the map and not by the renderer for two reasons:
   * First, attribute checks for classification can be reduced to one check
   * per entity when loading the map. Second, scale visibility information
   * can be used to organize map for fast scale-dependent filtering.
   * 
   * @author Ruediger Lunde
   */
  package aimax.osm.viewer;