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/.
A basemap provides the geographic context for the content you want to display in a map. In the ArcGIS Map Web Part, the basemap of the current map is displayed at the bottom of the Map Contents panel. The Map Web Part's basemap gallery allows you to choose from several Esri basemaps that are hosted on ArcGIS Online. These basemaps include many options that mix roads, aerial, and topographic data with a variety of symbology. When using the ArcGIS Map Web Part you can choose from the existing maps or configure the basemap gallery to include your custom basemap.
The basemap used in the application is displayed at the bottom of layer list in the Map Contents panel. The basemap layer cannot be removed from the Map Contents panel, but you may set the basemap's transparency and choose to hide it from the map contents. For more information on showing or hiding the basemap layer in the map contents, see the Map Contents panel.
The Basemap gallery appears.