diff --git a/src/.DS_Store b/src/.DS_Store
deleted file mode 100644
index 5008ddf..0000000
Binary files a/src/.DS_Store and /dev/null differ
diff --git a/src/canvas_tile_layer.js b/src/canvas_tile_layer.js
index 7ca4145..bce1b82 100644
--- a/src/canvas_tile_layer.js
+++ b/src/canvas_tile_layer.js
@@ -1,4 +1,10 @@
-function CanvasTileLayer(canvas_setup, render) {
+/*
+ ====================
+ canvas setup for drawing tiles
+ ====================
+ */
+
+ function CanvasTileLayer(canvas_setup, render) {
     this.tileSize = new google.maps.Size(256, 256);
     this.maxZoom = 19;
     this.name = "Tile #s";
diff --git a/src/grid_layer.js b/src/grid_layer.js
index 0e8071e..06897f8 100644
--- a/src/grid_layer.js
+++ b/src/grid_layer.js
@@ -1,6 +1,6 @@
 /*
  ====================
- this class renders deforestation data in a given time
+ this class renders tile data in a given time
  ====================
  */