This is the TileType Structure
+0x00 index - is strange
+0x02 buildability; 8th bit signs not buildable.
+0x03 groundHeight; Ground Height(4 lower bits) - Deprecated? Some values are incorrect.
+0x04 leftEdge;
+0x06 topEdge;
+0x08 rightEdge;
+0x0A buttomEdge;
+0x0C unknown
+0x0E unknown - Edge piece has rows above it. (Recently noticed; not fully understood.)
+0x10 unknown
+0x12 unknown
+0x14 miniTile (16 X 2 bytes)