Provides access to members that control symbol level drawing.
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Description
Use this interface to enable/disable Symbol Level Drawing for a layer.
When To Use
Symbol Level Drawing is useful when creating large scale maps with intersecting and overlapping line features. For example, on a large scale reference map with intersecting highways and streets, Symbol Level Drawing helps you create high-quality representations of the street and highway street intersections.
To set up Symbol Level Drawing:
- Turn on Symbol Level Drawing using either for your layer using ISymbolLevels::UseSymbolLevels, or for your entire map using IMap::UseSymbolLevels.
- For each layer that you want to set up symbol levels for, access that layer's renderer using IGeoFeatureLayer::Renderer.
- Access your layer's symbol(s) through the renderer.
- Using IMapLevel, set symbol levels on your layer's symbols. Symbols with MapLevel = 0 draw first, then symbols with MapLevel = 1, continuing until the highest MapLevel is reached. If two symbols have the same MapLevel, then the features drawn with these symbols are drawn in the normal layer order. A MapLevel of -1 for a multilayer symbol (MultiLayerMarkerSymbol, MultiLayerLineSymbol, MultiLayerFillSymbol) indicates that each of the symbol's individual layers are drawn with their individual MapLevel.
Members
| Description | ||
|---|---|---|
 |
UseSymbolLevels | Indicates if symbol levels are used for drawing. |
CoClasses that implement ISymbolLevels
| CoClasses and Classes | Description |
|---|---|
| CadastralFabricSubLayer | Cadastral Fabric Feature Layer Object. |
| CadFeatureLayer | Esri CAD Feature Layer class. |
| FeatureLayer | A collection of features and their visual representation. |
| GdbRasterCatalogLayer | Geodabase RasterCatalog source and display options. |
| GroupLayer | A collection of layers that behaves like a single layer. |
| MADtedLayer (esriDefenseSolutions) | A layer used to control the display of MA DTED Catalogs. |
| MARasterLayer (esriDefenseSolutions) | A layer used to control the display of MA RPF Catalogs. |
| NALayer (esriNetworkAnalyst) | The layer for defining, solving, and viewing network analysis results. |
| ProcessLayer (esriGeoprocessing) | A collection of process layers that behaves like a single layer. |
| SchematicLayer (esriSchematic) | A Schematic layer object. |