powershell script to copy gps-metadata between image files

lumia_gps_metadata_copy.ps1

# script to copy GPS metadata between files based on names.
# implemented for photos from Lumia 1020 phone which stores images in two sizes,
# one of them (low resolution image) has GPS but the other (high resolution image) does not!
# requires ExifTool: http://www.sno.phy.queensu.ca/~phil/exiftool 
# author: Harmish Khambhaita, v0.1, 13/04/2016 

# specify directory to process photos
$rootFolder = "C:\Users\your_name\Pictures\lumia_1020"

# specify location for exiftool
$exifTool = "C:\Users\your_name\Downloads\exiftool-10.14\exiftool.exe"

# main script, no need to change anything below this line

# check if root folder exist
if (-not (Test-Path -Path $RootFolder)) { Write-Output "root folder does not exist"; break }

# get all files in the root folder
$fileEntries = [IO.Directory]::GetFiles($RootFolder)

$noHigresFiles = @()
$highresFiles = @()
$processedFiles = @()
$unprocessedFiles = @()

# process files one-by-one
foreach($fileName in $fileEntries) 
{    
    # select high resolution images
    if ($fileName.Contains("highres"))
    {
        $highresFiles = $highresFiles + $fileName

        $lowResFileEntries = $fileEntries -like $fileName.Replace("__highres", "")
        if ($lowResFileEntries.Length -ne 1)
        {
            [Console]::WriteLine("Found " + $lowResFileEntries.Length + " (!= 1) entries for " + $lowResFileEntries)
            $unprocessedFiles = $unprocessedFiles + $fileName
            return
        }
        $lowResFileName = $lowResFileEntries[0]

        # we now have lowres and highres files
        #[Console]::WriteLine("Found pair:`n`t" + $fileName + "`n`t" + $lowResFileName)
        #$metaLow=([xml](.$ExiftoolFolder\exiftool.exe $lowResFileName -X -r)).rdf.description
        #$metaHigh=([xml](.$ExiftoolFolder\exiftool.exe $fileName -X -r)).rdf.description

        .$exifTool -tagsFromFile $lowResFileName -gps:all -overwrite_original $fileName

        $processedFiles = $processedFiles + $fileName
    }
    else
    {
        $noHigresFiles = $noHigresFiles + $fileName
    }
}

# printing out summary 
[Console]::WriteLine("Processed " + $processedFiles.Length + " files`n" `
    + "`tout of " + $highresFiles.Length + " high-resolution image fiels`n" `
    + "`tand " + $unprocessedFiles.Length + " remained unprocessed`n" `
    + "`tthere were total " + $fileEntries.Length + " files and " + $noHigresFiles.Length + " non-high-resolution-image files`n" `
    + "`tin " + $rootFolder + " folder")

[Console]::WriteLine("`nProcessed files:")
foreach($file in $processedFiles)
{
    [Console]::WriteLine("`t" + $file)
}
[Console]::WriteLine("`nUnprocessed files:")
foreach($file in $unprocessedFiles)
{
    [Console]::WriteLine("`t" + $file)
}
[Console]::WriteLine("`nNon-high-resolution-image files:")
foreach($file in $noHigresFiles)
{
    [Console]::WriteLine("`t" + $file)
}