Easy Trace is often being used for correction of data previously vectorized and loaded to a GIS. For example, one of ArcView versions displaced polygons a little after specifying with the cursor and thus destroyed the polygonal coverage. The "Topology correction" Utility of Easy Trace proved to be useful for data reanimation... Another topological utility described in this article is equally powerful.

At manual tracing, operators usually input much more vertices than it is necessary for correct reproduction of the data topological structure. It is much easier to put a lot of superfluous points than to find the real point of line inflection in the image... As a result, the project is overladen with excess data and its quality decreases. In addition, even "cool" computers stall at big project processing...

Well, no quarter to superfluous vertices! But how to delete them without destruction of topological integrity? The Topology structure optimization utility is added for this purpose. It deletes unnecessary vertices from the specified layers but remains untouched topological integrity of the polygonal cover. It means that:

At that, vector data volume sharply decreases and screen output speeds up significantly.

It is extremely easy to run the utility - "freeze" the layers you do not want to alternate, start the utility, specify layers and exactness of approximation.

And here are the results taken from a real project . Before optimization:

After optimization: