If a FeatureReader uses a spatial filter with centers as the input and areas as initiators with Intersect, which statement best describes duplicates?

If a FeatureReader uses a spatial filter with centers as the input and areas as initiators with Intersect, which statement best describes duplicates?

• A. All centers will be read multiple times.
• B. Some centers will be read multiple times.
• C. No centers will be read more than once.
• D. No centers will be read.

Answer: (B)

When a Spatial Filter uses initiators, each input feature is tested against the initiator set. With centers as the input and areas as initiators using Intersect, every center is checked against every area it may intersect. If a center overlaps more than one area, it will be output once for each intersecting area, causing duplicates. So, some centers will be read multiple times depending on how many areas they intersect; centers that don’t intersect any area won’t be read, and those that intersect exactly one area will be read once.

When a Spatial Filter uses initiators, each input feature is tested against the initiator set. With centers as the input and areas as initiators using Intersect, every center is checked against every area it may intersect. If a center overlaps more than one area, it will be output once for each intersecting area, causing duplicates. So, some centers will be read multiple times depending on how many areas they intersect; centers that don’t intersect any area won’t be read, and those that intersect exactly one area will be read once.