diff --git a/core/src/main/java/com/seibel/lod/core/api/external/methods/data/DhApiTerrainDataRepo.java b/core/src/main/java/com/seibel/lod/core/api/external/methods/data/DhApiTerrainDataRepo.java
index 1b6325250..12ceeb850 100644
--- a/core/src/main/java/com/seibel/lod/core/api/external/methods/data/DhApiTerrainDataRepo.java
+++ b/core/src/main/java/com/seibel/lod/core/api/external/methods/data/DhApiTerrainDataRepo.java
@@ -189,8 +189,8 @@ public class DhApiTerrainDataRepo implements IDhApiTerrainDataRepo
 							if (dataPoint != 0)
 							{
 								int requestedY = nullableBlockYPos;
-								int bottomY = FullDataPoint.getY(dataPoint) + levelMinimumHeight; // TODO rename getY to getBottomY
-								int height = FullDataPoint.getDepth(dataPoint); // TODO rename to getHeight
+								int bottomY = FullDataPoint.getBottomY(dataPoint) + levelMinimumHeight;
+								int height = FullDataPoint.getHeight(dataPoint);
 								int topY = bottomY + height;
 								
 								// does this datapoint contain the requested Y position? 
@@ -220,14 +220,14 @@ public class DhApiTerrainDataRepo implements IDhApiTerrainDataRepo
 		}
 	}
 	
-	private static DhApiTerrainDataPoint generateApiDatapoint(FullDataPointIdMap mapping, byte detailLevel, long dataPoint)
+	private static DhApiTerrainDataPoint generateApiDatapoint(IDhApiLevelWrapper levelWrapper, FullDataPointIdMap mapping, byte detailLevel, long dataPoint)
 	{
 		IBlockStateWrapper blockState = mapping.getBlockStateWrapper(FullDataPoint.getId(dataPoint));
 		IBiomeWrapper biomeWrapper = mapping.getBiomeWrapper(FullDataPoint.getId(dataPoint));
 		
-		int topY = FullDataPoint.getY(dataPoint);
-		int depth = FullDataPoint.getDepth(dataPoint);
-		int bottomY = topY - depth;
+		int bottomY = FullDataPoint.getBottomY(dataPoint) + levelWrapper.getMinHeight();
+		int height = FullDataPoint.getHeight(dataPoint);
+		int topY = bottomY + height;
 		
 		return new DhApiTerrainDataPoint(detailLevel, 
 				FullDataPoint.getLight(dataPoint), topY, bottomY,
diff --git a/core/src/main/java/com/seibel/lod/core/datatype/full/FullDataPoint.java b/core/src/main/java/com/seibel/lod/core/datatype/full/FullDataPoint.java
index 120fb2936..781c0a9ad 100644
--- a/core/src/main/java/com/seibel/lod/core/datatype/full/FullDataPoint.java
+++ b/core/src/main/java/com/seibel/lod/core/datatype/full/FullDataPoint.java
@@ -39,6 +39,7 @@ public class FullDataPoint
     public static final int LIGHT_WIDTH = 8;
     public static final int ID_OFFSET = 0;
     public static final int DP_OFFSET = ID_OFFSET + ID_WIDTH;
+	/** indicates the Y position where the LOD starts relative to the level's minimum height */
     public static final int Y_OFFSET = DP_OFFSET + DP_WIDTH;
     public static final int LIGHT_OFFSET = Y_OFFSET + Y_WIDTH;
 	
@@ -62,19 +63,22 @@ public class FullDataPoint
         data |= (long) (depth & DP_MASK) << DP_OFFSET;
         data |= (long) (y & Y_MASK) << Y_OFFSET;
         data |= (long) lightPair << LIGHT_OFFSET;
-        LodUtil.assertTrue(getId(data) == id && getDepth(data) == depth && getY(data) == y && getLight(data) == Byte.toUnsignedInt(lightPair),
+        LodUtil.assertTrue(getId(data) == id && getHeight(data) == depth && getBottomY(data) == y && getLight(data) == Byte.toUnsignedInt(lightPair),
                 "Trying to create datapoint with id[{}], depth[{}], y[{}], lightPair[{}] but got id[{}], depth[{}], y[{}], lightPair[{}]!",
-                id, depth, y, Byte.toUnsignedInt(lightPair), getId(data), getDepth(data), getY(data), getLight(data));
+                id, depth, y, Byte.toUnsignedInt(lightPair), getId(data), getHeight(data), getBottomY(data), getLight(data));
 		
         return data;
     }
 	
+	/** Returns the BlockState/Biome pair ID used to identify this LOD's color  */
     public static int getId(long data) { return (int) (data & ID_MASK); }
-    public static int getDepth(long data) { return (int) ((data >> DP_OFFSET) & DP_MASK); }
-    public static int getY(long data) { return (int) ((data >> Y_OFFSET) & Y_MASK); }
+	/** Returns how many blocks tall this LOD is. */
+    public static int getHeight(long data) { return (int) ((data >> DP_OFFSET) & DP_MASK); }
+	/** Returns the block position of the bottom vertices for this LOD relative to the level's minimum height. */
+    public static int getBottomY(long data) { return (int) ((data >> Y_OFFSET) & Y_MASK); }
     public static int getLight(long data) { return (int) ((data >> LIGHT_OFFSET) & LIGHT_MASK); }
 	
-    public static String toString(long data) { return "[ID:" + getId(data) + ",Y:" + getY(data) + ",Depth:" + getY(data) + ",Light:" + getLight(data) + "]"; }
+    public static String toString(long data) { return "[ID:" + getId(data) + ",Y:" + getBottomY(data) + ",Height:" + getBottomY(data) + ",Light:" + getLight(data) + "]"; }
 	
 	/** Remaps the biome/blockState ID of the given datapoint */
     @Contract(pure = true)
diff --git a/core/src/main/java/com/seibel/lod/core/datatype/transform/FullToColumnTransformer.java b/core/src/main/java/com/seibel/lod/core/datatype/transform/FullToColumnTransformer.java
index 2ec83b920..e30a3332d 100644
--- a/core/src/main/java/com/seibel/lod/core/datatype/transform/FullToColumnTransformer.java
+++ b/core/src/main/java/com/seibel/lod/core/datatype/transform/FullToColumnTransformer.java
@@ -168,16 +168,16 @@ public class FullToColumnTransformer {
         int offset = 0;
         for (int i = 0; i < data.getSingleLength(); i++) {
             long fullData = data.getSingle(i);
-            int y = FullDataPoint.getY(fullData);
-            int blockLength = FullDataPoint.getDepth(fullData);
+            int bottomY = FullDataPoint.getBottomY(fullData);
+            int blockHeight = FullDataPoint.getHeight(fullData);
             int id = FullDataPoint.getId(fullData);
             int light = FullDataPoint.getLight(fullData);
             IBiomeWrapper biome = mapping.getBiomeWrapper(id);
             IBlockStateWrapper block = mapping.getBlockStateWrapper(id);
             if (block.equals(AIR)) continue;
             isVoid = false;
-            int color = level.computeBaseColor(new DhBlockPos(blockX, y + level.getMinY(), blockZ), biome, block);
-            long columnData = ColumnFormat.createDataPoint(y + blockLength, y, color, light, genMode);
+            int color = level.computeBaseColor(new DhBlockPos(blockX, bottomY + level.getMinY(), blockZ), biome, block);
+            long columnData = ColumnFormat.createDataPoint(bottomY + blockHeight, bottomY, color, light, genMode);
             column.set(offset, columnData);
             offset++;
         }