Configure Navigation Hierarchies using Single value Choice field in SharePoint 2010 using powershell

$siteURL="http://serverName:1111/" $site=Get-SPSite $siteURL $web=$site.RootWeb $list=$web.Lists.TryGetList("cl") $field=$list.Fields["Country"] $listNavSettings=[Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationSettings]::GetMetadataNavigationSettings($list) $mdnNavHierarchy=New-Object Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationHierarchy($field) $listNavSettings.AddConfiguredHierarchy($mdnNavHierarchy) [Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationSettings]::SetMetadataNavigationSettings($list, $listNavSettings, $true)