Intersect

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In GIS, an Intersect is an analytical operation that computes a geometric intersection of more than one input feature. The areas of map features that are common to all layers become the intersect output. Input features can include any combination of point, line, and polygon features.

An example of the intersect tool would be if the composite of several distribution areas of wildlife species was needed to determine a buffer zone for a proposed highway. The intersect tool could produce an output polygon with all the common areas of the species distribution polygons, subsequently excluding all areas of the distribution polygons that do not share common areas with other polygons^[1]

When two polygons are intersected, a third polygon is produced that only covers the area where the two original polygons overlap.

[edit] External links

• Intersect (Analysis). ArcGIS 9.2 Desktop Help. Retrieved 4 October 2011.

[edit] References

1. ↑ de Smith, Michael; Goodchild, Paul; Longley, Mike. Geospatial Analysis – a comprehensive guide. 3rd edition © 2006-2011