xaml - Best Way to use maps In Windows Phone -

in documentation says using map control in windows phone 8.0 obsellete using method. not find how implement api maps in windows phone 8.0 silverlight?

<maps:map x:name="bingmap" >    <maps:map.center>       <location:geocoordinate altitude="nan"                               course="nan"horizontalaccuracy="nan"                                                                 longitude="-2.922363"                                latitude="54.6128"                                speed="nan"                                verticalaccuracy="nan"/>    </maps:map.center>  </maps:map> 

can please provide namespace code?

i'm developing windows phone 8 silverlight app , i'm using one:

xmlns:maps="clr-namespace:microsoft.phone.maps.controls;assembly=microsoft.phone.maps"

besides, i've found note in msdn documentation, map api:

"the new maps api in windows phone 8 different bing maps available in windows phone os 7.1. bing maps control still supported in windows phone 8, deprecated. typically, time should use bing maps control in existing app have upgraded windows phone os 7.1 windows phone 8."