Overlays (1) (AutoCAD) - Spatial Manager Blog

This video starts a series dedicated to one of the most powerful geometric and data-driven analysis tools included in 'Spatial Manager for AutoCAD': the Overlay command. There are several operators to apply in the Overlay function, but they always have in common that they are processed based on two sets of objects and return as a result new objects in the drawing. This video discusses one of the possibilities of the "Erase" operator

As you will see in the video, in this example the aim is to obtain the fragmentation of Parcels of a municipality that are crossed by fluvial streams, considering a margin of width for these creeks

First, another 'Spatial Manager for AutoCAD' spatial analysis tool (Buffer) is used to determine the polygon resulting from applying a width of influence around the creek axes

Next, the calculation of an Overlay by Erasure between the resulting Buffer and the Parcels is executed. The “Erase” operator determines the geometries from the Parcels that do not intersect with the creeks Buffer object. Generally, you can use Erase in order to subtract sections for a group of objects

Once you have obtained the fragments of Parcels not affected by the streams, you can, for example, run an Export process to obtain the areas of these fragments, as you can see in the video

Enjoy the video