diff --git a/common/coords.go b/common/coords.go
index e7c3490..0491549 100644
--- a/common/coords.go
+++ b/common/coords.go
@@ -161,6 +161,22 @@ func IdentityTranscoder(key []byte) ([]byte, error) {
 	return key, nil
 }
 
+func TranscodePlainToInterleaved(key []byte) ([]byte, error) {
+	if pos, err := DecodeStringFromBytesToInterleaved(key); err != nil {
+		return nil, err
+	} else {
+		return EncodeToBigEndian(pos)
+	}
+}
+
+func TranscodeInterleavedToPlain(key []byte) ([]byte, error) {
+	if pos, err := DecodeFromBigEndian(key); err != nil {
+		return nil, err
+	} else {
+		return EncodeStringToBytes(TransformInterleavedToPlain(pos))
+	}
+}
+
 func SelectKeySplitter(interleaved bool) KeySplitter {
 	if interleaved {
 		return InterleavedToCoord