diff --git a/coords/tilecoords.go b/coords/tilecoords.go
index 12ce9b7..5b50ec1 100644
--- a/coords/tilecoords.go
+++ b/coords/tilecoords.go
@@ -7,21 +7,23 @@ import (
 type TileCoords struct {
 	X, Y int
 	Zoom int
+	LayerId int
 }
 
 type TileQuadrants struct {
 	UpperLeft, UpperRight, LowerLeft, LowerRight TileCoords
 }
 
-func NewTileCoords(x, y, zoom int) TileCoords {
-	return TileCoords{X: x, Y: y, Zoom: zoom}
+func NewTileCoords(x, y, zoom int, layerId int) TileCoords {
+	return TileCoords{X: x, Y: y, Zoom: zoom, LayerId: layerId}
 }
 
 func (tc TileCoords) GetZoomedOutTile() TileCoords {
 	return TileCoords{
 		X:    int(math.Floor(float64(tc.X) / 2.0)),
 		Y:    int(math.Floor(float64(tc.Y) / 2.0)),
-		Zoom: tc.Zoom - 1}
+		Zoom: tc.Zoom - 1,
+		LayerId: tc.LayerId}
 }
 
 func (tc TileCoords) GetZoomedQuadrantsFromTile() TileQuadrants {
@@ -30,10 +32,10 @@ func (tc TileCoords) GetZoomedQuadrantsFromTile() TileQuadrants {
 	nextZoomX := tc.X * 2
 	nextZoomY := tc.Y * 2
 
-	upperLeft := TileCoords{X: nextZoomX, Y: nextZoomY, Zoom: nextZoom}
-	upperRight := TileCoords{X: nextZoomX + 1, Y: nextZoomY, Zoom: nextZoom}
-	lowerLeft := TileCoords{X: nextZoomX, Y: nextZoomY + 1, Zoom: nextZoom}
-	lowerRight := TileCoords{X: nextZoomX + 1, Y: nextZoomY + 1, Zoom: nextZoom}
+	upperLeft := TileCoords{X: nextZoomX, Y: nextZoomY, Zoom: nextZoom, LayerId: tc.LayerId}
+	upperRight := TileCoords{X: nextZoomX + 1, Y: nextZoomY, Zoom: nextZoom, LayerId: tc.LayerId}
+	lowerLeft := TileCoords{X: nextZoomX, Y: nextZoomY + 1, Zoom: nextZoom, LayerId: tc.LayerId}
+	lowerRight := TileCoords{X: nextZoomX + 1, Y: nextZoomY + 1, Zoom: nextZoom, LayerId: tc.LayerId}
 
 	return TileQuadrants{
 		UpperLeft:  upperLeft,
diff --git a/initialrenderer/renderer.go b/initialrenderer/renderer.go
index 345cad7..6592632 100644
--- a/initialrenderer/renderer.go
+++ b/initialrenderer/renderer.go
@@ -22,7 +22,7 @@ func Render(renderer *mapblockrenderer.MapBlockRenderer,
     go func() {
       for result := range results {
         tc := coords.GetTileCoordsFromMapBlock(result.Job.Pos1)
-        tile := tiledb.Tile{Pos: tc, LayerId: 0, Data: result.Data.Bytes(), Mtime: time.Now().Unix()}
+        tile := tiledb.Tile{Pos: tc, Data: result.Data.Bytes(), Mtime: time.Now().Unix()}
         tdb.SetTile(&tile)
       }
     }()
diff --git a/mapblockrenderer/renderer_test.go b/mapblockrenderer/renderer_test.go
index 2326fdb..13c8f72 100644
--- a/mapblockrenderer/renderer_test.go
+++ b/mapblockrenderer/renderer_test.go
@@ -76,6 +76,5 @@ func TestSimpleRender(t *testing.T) {
 	}
 
 	close(jobs)
-	defer close(results)
 
 }
diff --git a/tiledb/accessor.go b/tiledb/accessor.go
index 367a1e6..eecda5d 100644
--- a/tiledb/accessor.go
+++ b/tiledb/accessor.go
@@ -6,13 +6,12 @@ import (
 
 type Tile struct {
 	Pos     coords.TileCoords
-	LayerId int
 	Data    []byte
 	Mtime   int64
 }
 
 type DBAccessor interface {
 	Migrate() error
-	GetTile(layerId int, pos coords.TileCoords) (*Tile, error)
+	GetTile(pos coords.TileCoords) (*Tile, error)
 	SetTile(tile *Tile) error
 }
diff --git a/tiledb/sqlite.go b/tiledb/sqlite.go
index f5bbdd4..2440cbc 100644
--- a/tiledb/sqlite.go
+++ b/tiledb/sqlite.go
@@ -47,8 +47,8 @@ and t.y = ?
 and t.zoom = ?
 `
 
-func (db *Sqlite3Accessor) GetTile(layerId int, pos coords.TileCoords) (*Tile, error) {
-	rows, err := db.db.Query(getTileQuery, layerId, pos.X, pos.Y, pos.Zoom)
+func (db *Sqlite3Accessor) GetTile(pos coords.TileCoords) (*Tile, error) {
+	rows, err := db.db.Query(getTileQuery, pos.LayerId, pos.X, pos.Y, pos.Zoom)
 	if err != nil {
 		return nil, err
 	}
@@ -70,7 +70,6 @@ func (db *Sqlite3Accessor) GetTile(layerId int, pos coords.TileCoords) (*Tile, e
 
 		mb := Tile{
 			Pos:     pos,
-			LayerId: layerId,
 			Data:    data,
 			Mtime:   mtime,
 		}
@@ -87,7 +86,7 @@ values(?, ?, ?, ?, ?, ?)
 `
 
 func (db *Sqlite3Accessor) SetTile(tile *Tile) error {
-	_, err := db.db.Exec(setTileQuery, tile.Pos.X, tile.Pos.Y, tile.Pos.Zoom, tile.LayerId, tile.Data, tile.Mtime)
+	_, err := db.db.Exec(setTileQuery, tile.Pos.X, tile.Pos.Y, tile.Pos.Zoom, tile.Pos.LayerId, tile.Data, tile.Mtime)
 	return err
 }
 
diff --git a/tiledb/sqlite_test.go b/tiledb/sqlite_test.go
index 3eaebc4..d4519f8 100644
--- a/tiledb/sqlite_test.go
+++ b/tiledb/sqlite_test.go
@@ -24,8 +24,8 @@ func TestMigrate(t *testing.T) {
 		panic(err)
 	}
 
-	pos := coords.NewTileCoords(0, 0, 13)
-	tile, err := db.GetTile(0, pos)
+	pos := coords.NewTileCoords(0, 0, 13, 0)
+	tile, err := db.GetTile(pos)
 	if err != nil {
 		panic(err)
 	}
@@ -35,14 +35,14 @@ func TestMigrate(t *testing.T) {
 	}
 
 	data := []byte{0x01, 0x02}
-	tile2 := Tile{LayerId: 0, Pos: pos, Data: data}
+	tile2 := Tile{Pos: pos, Data: data}
 	err = db.SetTile(&tile2)
 
 	if err != nil {
 		panic(err)
 	}
 
-	tile3, err := db.GetTile(0, pos)
+	tile3, err := db.GetTile(pos)
 
 	if err != nil {
 		panic(err)
diff --git a/tilerenderer/renderer.go b/tilerenderer/renderer.go
index d83f4ee..ba32d9d 100644
--- a/tilerenderer/renderer.go
+++ b/tilerenderer/renderer.go
@@ -4,22 +4,19 @@ import (
 	"image"
 	"mapserver/coords"
 	"mapserver/mapblockrenderer"
-	"mapserver/tiledb"
 )
 
 type TileRenderer struct {
 	mapblockrenderer *mapblockrenderer.MapBlockRenderer
-	tiledb           *tiledb.DBAccessor
 }
 
-func NewTileRenderer(mapblockrenderer *mapblockrenderer.MapBlockRenderer, tiledb *tiledb.DBAccessor) *TileRenderer {
+func NewTileRenderer(mapblockrenderer *mapblockrenderer.MapBlockRenderer) *TileRenderer {
 	return &TileRenderer{
 		mapblockrenderer: mapblockrenderer,
-		tiledb:           tiledb,
 	}
 }
 
 //TODO layerConfig
-func (tr *TileRenderer) Render(tc coords.TileCoords, layerId int) (*image.NRGBA, error) {
+func (tr *TileRenderer) Render(tc coords.TileCoords) (*image.NRGBA, error) {
 	return nil, nil
 }