function Upload-SPDocument([string]$url, [string]$Folder, [string]$Document, [string]$Year, [string]$Location) {

  $spAssignment = Start-SPAssignment

  $SPWeb = Get-SPWeb $url -AssignmentCollection $spAssignment

  $DocumentName = Split-Path $Document -Leaf
  $spFolder = $SPWeb.GetFolder($Folder)

  $spFileCollection = $spFolder.Files

  $spFile = $spFileCollection.Add("$Folder/$DocumentName",$((gci $Document).OpenRead()))
  $spFile.Item["Title"] = $DocumentName
  $spFile.Item["Year"] = $Year
  $spFile.Item["Location"] = $Location
  $spFile.Item.Update()

  Stop-SPAssignment $spAssignment
}

$Sydney = Get-ChildItem C:\Demo\Documents\Sydney -Recurse | 
  Where { $_.Attributes -notmatch "Directory" } | 
    Select FullName,
    @{Name="Year";Expression={($_.CreationTime).Year}},
    @{Name="Location";Expression={"Sydney"}}

$Wellington = Get-ChildItem C:\Demo\Documents\Wellington -Recurse |
  Where { $_.Attributes -notmatch "Directory" } |
    Select FullName,
    @{Name="Year";Expression={($_.CreationTime).Year}},
    @{Name="Location";Expression={"Wellington"}}

$Files = $Sydney + $Wellington

$Files | ForEach {
 Upload-SPDocument -url http://SPServer01 -Folder "Shared Documents" -Document $($_.FullName) -Year $($_.Year) -Location $($_.Location)
}