Cadastral Mapping requires clean linework so that accurate area measurements can be obtained. Early implementations of the Topology Creation and Topology Cleanup tools were written for MicroStation GeoGraphics and carried forward through the Bentley Map 2004, XM, and V8i (SELECTseries) products.
While spatial data creation has improved over time, the data requirements (boundaries made from lines, with centroids) have not changed for these commands. If you have areas, polygons, or other closed shapes made from MicroStation elements, you will have to use MicroStation tools to break them down into their component parts for these commands to work properly. This can be done with the Drop Element tool, or in extreme cases by redigitizing.
The Find Slivers command can be found in the Tolology Cleanup toolbox and is used to flag or merge slivers into adjacent areas.
Slivers are very thin or small areas that are inadvertently created during digitizing or from the result of overlaying two topology layers. Removing slivers after digitizing consists of the following tasks:
Consider combining Layer A+B with Layer C:
Which results in:
The Find Slivers tool can locate the erroneous sliver that was created when the layers were combined.
For details on the tool settings, please refer to:
Find Slivers Tool