This is an archive related to a previous version of Esri Maps for SharePoint. If you need the current version go to http://doc.arcgis.com/en/maps-for-sharepoint/.
Symbols define all the nongeographic aspects of the appearance of a feature on the map. The ArcGIS Map Web Part provides many options to symbolize features. Layers that get their data from a layer in an ArcGIS for Server map service, a table in a Spatial Data service, or a SharePoint list allow the configuration of symbology, as these layer types are rendered on the client. See Layer types for more information.
To get started configuring symbols, open the Map Contents panel and click the layer to select it. Click the Symbols tab of the ArcGIS Map Web Part ribbon to view the configuration options as shown in the following screen capture:
The ArcGIS Map Web Part provides galleries of symbols that can be used to configure client-side layers. For information on configuring these galleries, see Configure symbols.
Renderers define one or more symbols to apply to a layer. There are three types of renderers available in the ArcGIS Map Web Part: single symbol, class breaks, and unique values. Single symbol renderers apply one symbol to all features in a layer. For information on how to symbolize layers with a single symbol, see Single symbol rendering. Class breaks and unique values renderers apply symbols to features in a layer based on attributes of each feature. The renderer specifies which attribute values correspond to which symbol. For information on using the class breaks renderer, see Class breaks rendering. For information on how to symbolize a layer by unique values, see Unique value rendering.
Point layers also provide the option to generate a heat map or apply clustering. These are methods of aggregating features to aid in visualizing them. See Heat maps and Clustering for more information.