Improving Bingmaps rendering

[Ian]

Hi there. Its come to the point in my project where i finally have some real world data to display. Even now its only a small subset.

In some cases we may end up rendering > 500 points on a map. However even now this small subset (100-500) i notice alot of slowdown, when panning/zooming e.t.c on the map. I realise this is probably a bingmaps limitation but im looking for ways to improve any bottlenecks.

Here is what i have done

1) Use a Dynamic layer to draw all my sites
2)Setup the dynamic layer zoomlist

const int viewportWidth = 256;
const int viewportHeight = 256;

for (int zoomLayerIndex = 1; zoomLayerIndex <= 20; zoomLayerIndex += 1)
{
    this.Dynamiclayer.ZoomGridList.Add(new ZoomGrid((int)(Math.Pow(2, zoomLayerIndex + 8) / viewportWidth),
        (int)(Math.Pow(2, zoomLayerIndex + 8) / viewportHeight), zoomLayerIndex));
}

3) Added display toggles to turn on/off various objects (most of with a rendered on different information layers). Things like kml/shapefiles e.t.c
4) limited what i render to only very small [image] objects

Do you have any other suggestions ? Ive also noticed it can be quite slow when rendering some kml files but that is less important for performance.

Any other suggestions ?

[Andrey]

Hi Ian,

In fact the performance of the information layer could be insufficient when displaying many map objects. In some cases you can overcome that by using the VirtualizationLayer to improve performance, but unfortunately it does not support map shapes.

In the Q2 2013 release we've introduced new visualization engine in the RadMap. It has been designed from scratch to have better performance. The new engine is based on the VisualizationLayer class. I would recommend giving it a try.

It contains built-in virtualization and clustering features which are simple to use. You can find documentation and examples of the new layer here:

• http://www.telerik.com/help/silverlight/radmap-visualization-layer-introduction.html

• http://demos.telerik.com/silverlight/#Map/DataBinding

• http://demos.telerik.com/silverlight/#Map/ClusterVirtualization

• http://demos.telerik.com/silverlight/#Map/AsyncReadWithVirtualization

Let me know if it helps.

Regards,

Andrey Murzov

Telerik