diff --git a/d2common/d2fileformats/d2ds1/layer.go b/d2common/d2fileformats/d2ds1/layer.go
index aacc180c..64edbe9a 100644
--- a/d2common/d2fileformats/d2ds1/layer.go
+++ b/d2common/d2fileformats/d2ds1/layer.go
@@ -24,10 +24,12 @@ type (
 	tileGrid []tileRow // index is y coordinate
 )
 
+// Layer is an abstraction of a tile grid with some helper methods
 type Layer struct {
 	tiles tileGrid
 }
 
+// Tile returns the tile at the given x,y coordinate in the grid, or nil if empty.
 func (l *Layer) Tile(x, y int) *Tile {
 	if l.Width() < x || l.Height() < y {
 		return nil
@@ -36,6 +38,7 @@ func (l *Layer) Tile(x, y int) *Tile {
 	return &l.tiles[y][x]
 }
 
+// SetTile sets the tile at the given x,y coordinate in the tile grid
 func (l *Layer) SetTile(x, y int, t *Tile) {
 	if l.Width() > x || l.Height() > y {
 		return
@@ -44,6 +47,7 @@ func (l *Layer) SetTile(x, y int, t *Tile) {
 	l.tiles[y][x] = *t
 }
 
+// Width returns the width of the tile grid
 func (l *Layer) Width() int {
 	if len(l.tiles[0]) < 1 {
 		l.SetWidth(1)
@@ -52,6 +56,7 @@ func (l *Layer) Width() int {
 	return len(l.tiles[0])
 }
 
+// SetWidth sets the width of the tile grid, minimum of 1
 func (l *Layer) SetWidth(w int) *Layer {
 	if w < 1 {
 		w = 1
@@ -82,6 +87,7 @@ func (l *Layer) SetWidth(w int) *Layer {
 	return l
 }
 
+// Height returns the height of the tile grid
 func (l *Layer) Height() int {
 	if len(l.tiles) < 1 {
 		l.SetHeight(1)
@@ -90,6 +96,7 @@ func (l *Layer) Height() int {
 	return len(l.tiles)
 }
 
+// SetHeight sets the height of the tile grid, minimum of 1
 func (l *Layer) SetHeight(h int) *Layer {
 	if h < 1 {
 		h = 1
@@ -122,10 +129,12 @@ func (l *Layer) SetHeight(h int) *Layer {
 	return l
 }
 
+// Size returns the width and height of the tile grid
 func (l *Layer) Size() (w, h int) {
 	return l.Width(), l.Height()
 }
 
+// SetSize sets the width and height of the tile grid
 func (l *Layer) SetSize(w, h int) *Layer {
 	return l.SetWidth(w).SetHeight(h)
 }