An enumeration. A LayerType can be assigned to a Layer. The choice for a LayerType usually depends on the nature of the data that the Layer is visualizing.
"BASE" LayerType.Indicates the layer must always be positioned as the last layer in the Map, behind all other layers. Even when multiple BASE Layers are added to a Map, only the top one will be drawn. In practice this means that the visibility of other BASE-layers will be automatically turned off when a new visible BASE Layer is added. Layers of this type are usually layers with raster data.
"DYNAMIC" LayerType.LuciadRIA uses this flag to optimize rendering with the assumption that a lot of data in the model changes often. Use this layer type when you want the data updates on screen as fast as possible.
"STATIC" LayerType.LuciadRIA uses this flag to optimize the rendering with the assumption that the model contains data that does not change often or at all. This is the default.