diff --git a/mongodb/adapter.go b/mongodb/adapter.go
index b248365..76033e2 100644
--- a/mongodb/adapter.go
+++ b/mongodb/adapter.go
@@ -9,6 +9,10 @@ import (
 	"time"
 )
 
+const errNoCollection string = "collection not found: felt.%s"
+const errNoDocument string = "document with name/id '%s' doesn't exist in collection: %s"
+const errNotAString string = "document property is not a string: %s<key=%s>.%s"
+
 type DbAdapter interface {
 	Init(mongoUri string) error
 
@@ -82,14 +86,59 @@ func (self *DbEngine) ensureCollections(db mongo.Database) error {
 func (self *DbEngine) CreateTable(table models.TableKey) error {
 	tables := self.db.Collection("tables")
 	if tables != nil {
-		_, err := tables.insertOne(self.mkCtx(10), bson.D{
+		_, err := tables.InsertOne(self.mkCtx(10), bson.D{
 			{"name", table.Name},
 			{"passcode", table.Passcode},
 			{"mapUri", ""},
 			{"diceRolls", bson.A{}},
 			{"tokens", bson.A{}},
 		})
+		return err
+	}
+	return errors.New(fmt.Sprintf(errNoCollection, "tables"))
+
+}
+
+func (self *DbEngine) SetMapImageUrl(table models.TableKey, url string) error {
+	tables := self.db.Collection("tables")
+	if tables != nil {
+		_, err := tables.UpdateOne(
+			self.mkCtx(10),
+			bson.D{
+				{"name", table.Name},
+				{"passcode", table.Passcode},
+			},
+			bson.D{
+				{"mapImageUrl", url},
+			},
+		)
+
+		return err
 	}
 
-	return err
+	return errors.New(fmt.Sprintf(errNoCollection, "tables"))
+}
+
+func (self *DbEngine) GetMapImageUrl(table models.TableKey) (string, error) {
+	tables := self.db.Collection("tables")
+	if tables != nil {
+		fromDb := tables.FindOne(
+			self.mkCtx(10),
+			bson.D{
+				{"name", table.Name},
+				{"passcode", table.Passcode},
+			})
+		if fromDb != nil {
+			url, ok := fromDb.Lookup("mapUri").StringValueOK()
+			if ok {
+				return url, nil
+			} else {
+				return "", errors.New(fmt.Sprintf(errNotAString, "table", table.Name, "mapUri"))
+			}
+		} else {
+			return "", errors.New(fmt.Sprintf(errNoDocument, table.Name, "tables"))
+		}
+	}
+
+	return "", errors.New(fmt.Sprintf(errNoCollection, "tables"))
 }