A type of GeoElement that has a shape (geometry), symbol, and attributes and can be displayed in a map view or scene view. Graphics are used to represent temporary data that exists for the lifetime of the application. For example, you can:
Show updated locations for objects in the map view, such as moving vehicles.
Display results from an analysis, geocoding, or routing operation.
Allow the user to draw temporary sketches on top of the map.
Store user input, such as a set of route stops to visit.
Show ad hoc text labels to describe things on the map.
To display a graphic, add it to a GraphicsOverlay.graphics collection and add the graphics overlay to your map view or scene view.
Each graphic has a geometry describing its location and shape. To maximize performance, the geometry should have the same SpatialReference as the map view or scene view to which it is added. If the geometry has a different SpatialReference, it will be reprojected on-the-fly. This can be computationally expensive when displaying a large number of graphics.
A graphic can have an associated Symbol that defines the graphic's appearance. Alternatively, the GraphicsOverlay can be assigned a Renderer that determines the appearance of all graphics in the overlay. If a graphic has an associated symbol, the symbol will override the overlay's renderer for the graphic's display. The symbol used depends on the geometry type associated with the graphic. A MarkerSymbol is used for Point and Multipoint geometries, a SimpleLineSymbol for Polyline geometries, and a SimpleFillSymbol for Polygon or Envelope geometries.
Each graphic can have a collection of attributes (as key-value pairs) to provide more information.
Defines the graphic's appearance when displayed in a map view or scene view. For graphics to appear in a map view or scene view, they must have a Symbol or be added to a graphics overlay that has a renderer assigned. A Symbol defines the properties used to display the graphic, such as color, outline, size, and style. There are many different types of symbols, such as SimpleMarkerSymbol, SimpleLineSymbol, and SimpleFillSymbol. The symbol type must match the GeometryType of the graphic. For example, a FillSymbol is used with graphics that are based on polygon geometry. The rendering of a graphic's symbol takes precedence over the Renderer that may be set on the GraphicsOverlay.
Defines the draw order of a graphic. Graphics with higher Z-index values are drawn on top of lower Z-index graphics A graphic's Z-index is mostly relevant for display in a two-dimensional map view. For dynamic 3D rendering (in a scene view), graphic display order is determined by the distance to the camera rather than by Z-index. The Z-index is considered, however, when using static rendering in a scene view (draping graphics on the surface, in other words).