How to Fix Topology Gaps

Input your spatial data about the area under study into your topology software application.

Establish a cluster tolerance for your topology data set. This focuses your topology model on a particular area. For example, suppose you are running a topology projection for an area of land where you plan to build homes, to see how soil shifting will affect the stability of foundations. You could choose the entire development for your cluster, or you could choose a block's worth. It depends on the size of your development and the level of detail you want in your projections.

Choose the features you want to show up on your model. In the example of the residential community, this could include planned or existing roads, changes in soil type and suggested property lines.

Run your analysis to see the topology projections for your area of land. When your model comes up onto the screen, you might notice gaps in the finished projects, such as proposed roads that do not go all the way to connecting streets. You might also see other errors, such as suggested property lines that don't make sense.

Use the error toolbar in your topology application to close any gaps and fix other errors. In some cases, you'll need to go in and make a new feature. This might include drawing your own proposed property line when the model leaves gaps in its suggested property grid. You might also need to extend existing features to cover up a gap, such as finishing a road. Some applications offer a tool that lets you check your model after each fix to see how realistic the solution is, given the topology forces at work.