0 - Never classified 
1 - Unassigned 
2 - Ground 
3 - Low Vegetation 
4 - Medium Vegetation 
5 - High Vegetation 
6 - Building 
7 - Low Point (noise) 
8 - Reserved 
9 - Water 
10 - Rail 
11 - Road Surface 
12 - Reserved 
13 - Wire – Guard (Shield) 
14 - Wire – Conductor (Phase) 
15 - Transmission Tower 
16 - Wire–Structure Connector (Insulator) 
17 - Bridge Deck 
18 - High Noise 
