Layer Lookup Table is used to match up MicroStation Levels to CAD Layers via a lookup table when exporting to MicroStation. If a lookup table is not defined and if exporting to MicroStation 95 (V7)(which only supports levels named from 1 to 63), then the layers will be named according to the order in which they were created in CAD. For example if the CAD layers are created in the following order;
1. FENCE
2. BUILDING
3. TREE
Then they will be matched to the MicroStation levels in the following manner.
FENCE = MicroStation level 2
BUILDING = MicroStation level 3
TREE = MicroStation level 4
Note: CAD layer DEFAULT always equals MicroStation level 1
If however a lookup table is not defined, and if exporting to MicroStation V8 (which supports levels named with alpha characters), then the levels will be named according to the layer names, i.e. FENCE = FENCE, etc.
From the AutoCAD or DGN Conversion Settings dialog box select a layer lookup table (.YLU file) from the Layer Lookup Table list and press Edit. The .YLU file will be opened in the currently configured text editor.
All lookup tables are created and held in the system's folder.
The lookup table is then set up in the following format.
Default = 1
CADLAYERname1 = 2
CADLAYERname2 = 3
Tip:
- To create a new lookup table, open an existing one and Save As a new name.