Resources and Information
Overlay
A complete set of overlay tools that allow you to create new objects based on spatial and attribute relationships between two groups of existing objects. These operations are essential for advanced spatial analysis and include:
- Intersect: Creates new objects from the overlapping areas of both input groups. Only the geometry and data common to both are preserved.
- Union: Merges all geometries from both groups into a single set of combined objects, consolidating their spatial extent.
- Erase: Removes portions of the first group that overlap with the second, preserving only the non-overlapping areas.
- Identity: Keeps all features from the first group and adds attribute data from overlapping features in the second group where intersections exist.
- Clip: Trims the objects from the first group to the spatial boundaries of the second group, like applying a geometric mask.
- Paste: Similar to Union, but includes only features from the second group that don’t overlap with the first.
- Symmetric Difference: Generates new objects from the areas that are exclusive to each group—removing the parts where they overlap.
