Can anyone help me in this? Many street network datasets lack z elevation fields needed to model overpass and tunnels (the F_ZLEV and T_ZLEV fields). Although my road network spatial database contains bridges and tunnels as features, I need to create the two fields from it. Is there a quick fix to automate this. I am thinking of something like:
- Select all road links and allocate F_ZLEV=0 and T_ZLEV=0
- Select all bridges which at their link start connect to road link and allocate F_ZLEV=0 and T_ZLEV=1
- Select all bridges which at their link end connect to road link and allocate F_ZLEV=1 and T_ZLEV=0
- Allocate all other bridge links F_ZLEV=1 and T_ZLEV=1.
Any ideas will help.