diff --git a/src/Plugin/OaiMetadataMap/DgiStandard.php b/src/Plugin/OaiMetadataMap/DgiStandard.php
index 3c43fc0..046710d 100644
--- a/src/Plugin/OaiMetadataMap/DgiStandard.php
+++ b/src/Plugin/OaiMetadataMap/DgiStandard.php
@@ -4,9 +4,11 @@
 
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
-use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Field\EntityReferenceFieldItemListInterface;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\GeneratedUrl;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\image\ImageStyleInterface;
 use Drupal\dgi_image_discovery\ImageDiscovery;
 use Drupal\entity_reference_revisions\EntityReferenceRevisionsFieldItemList;
 use Drupal\islandora\IslandoraUtils;
@@ -137,6 +139,9 @@ class DgiStandard extends OaiMetadataMapBase implements ContainerFactoryPluginIn
     'relators:spk' => 'dcterms:contributor',
     'relators:spn' => 'dcterms:contributor',
     'realtors:vdg' => 'dcterms:contributor',
+    'relators:art' => 'dcterms:creator',
+    'relators:ill' => 'dcterms:contributor',
+    'relators:trl' => 'dcterms:contributor',
   ];
 
   /**
@@ -160,6 +165,13 @@ class DgiStandard extends OaiMetadataMapBase implements ContainerFactoryPluginIn
    */
   protected ImageDiscovery $imageDiscovery;
 
+  /**
+   * The URL generator.
+   *
+   * @var \Drupal\dgi_image_discovery\UrlGeneratorPluginBase
+   */
+  protected $urlGenerator;
+
   /**
    * {@inheritdoc}
    */
@@ -170,6 +182,7 @@ public static function create(ContainerInterface $container, array $configuratio
     $plugin->entityTypeManager = $container->get('entity_type.manager');
     $plugin->utils = $container->get('islandora.utils');
     $plugin->imageDiscovery = $container->get('dgi_image_discovery.service');
+    $plugin->urlGenerator = $container->get('plugin.manager.dgi_image_discovery.url_generator')->createInstance('deferred');
     return $plugin;
   }
 
@@ -386,14 +399,22 @@ protected function addPersistentUrl(ContentEntityInterface $entity, $dest, $alia
    *   The destination index for the thumbnail.
    */
   public function addThumbnail(ContentEntityInterface $entity, $dest) {
-    $event = $this->imageDiscovery->getImage($entity);
+    $style_id = 'solr_grid_thumbnail';
+
+    // Load the image style.
+    $style = $this->entityTypeManager->getStorage('image_style')->load($style_id);
 
-    if ($event->hasMedia()) {
-      $media = $event->getMedia();
+    if ($style instanceof ImageStyleInterface) {
+      // Generate the URL using the Deferred plugin.
+      $generated_url = $this->urlGenerator->generate($entity, $style);
 
-      $fid = $media->getSource()->getSourceFieldValue($media);
-      $file = $this->entityTypeManager->getStorage('file')->load($fid);
-      $this->elements[$dest][] = $file->createFileUrl(FALSE);
+      // Add the resolved image URL to the elements array.
+      if ($generated_url instanceof GeneratedUrl) {
+        $url = $generated_url->getGeneratedUrl();
+        if (!empty($url)) {
+          $this->elements[$dest][] = $url;
+        }
+      }
     }
   }