Similar to the Scatter Area Map Series, the Proportional Symbol Series enables you to show thousands of data points on a map where symbols of different sizes and colors are used to represent geospatial data associated with different areas or locations.
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13.1 GeomAp proportional 

The Geographic Tile Series allows you to overlay multiple layers of geographic imagery, create cutouts to see underlying imagery, or use transparency to see through one layer of imagery while exposing the layer underneath. If you're a GIS developer, you can also load multiple tile data layers from Esri ArcGIS sources with the Geographic Map control.
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13.1 GeoMAp tile series 

Developers can now use Esri tile sets within the Geographic Map control. 256x256 tile sets based on Mercator projections are supported and are compatible with the tile sets from the other supported providers, including © OpenStreetMap, Bing® Maps, and Cloudmade. Other tile sizes and projections are not yet supported.
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13.1 Support for Esri ArcGIS 

Show thousands of data points on a map, such as precipitation measurements from thousands of weather stations in the USA. The colors are smoothly interpolated around the shape by creating a triangulation of the original data and by applying a pixel-wise triangle rasterizer to determine where the rain was heaviest.
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SL_geoScatterAreaSeries  

Just like Scatter Area Maps, Contour Line Maps can be used to show thousands of data points by joining points of equal value, such as elevations, precipitation levels, etc..
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SL_geoContourLineMapSeries  
 

Similar to the shape series, instead of simple path elements, the shape control series renders shapes as templated controls.
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SL_geoGeographicShape.png  
 

Use the map overview pane to navigate the maps in an intuitive and easy to use display.
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SL_geoOverViewPanel  
 

Some Geographic Series require a triangulation of XY+Value data in order to render, which can be a very time-consuming process when massive amounts of data points are involved. The new triangulation feature enables applications to avoid this computation at run-time by pre-triangulating the data and providing the triangulation to the GeoMap series.
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SL_geoTrianulation  
 

This new feature allows developers to save & load triangulation data to ITF files.
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 SL_geoTriangualtionFile