How is the Advan Parent Placekey column different from the Shared Polygon Info?

[jtatarka (Joseph Tatarka)]

I see that Advan provides a list of placekeys with shared polygons. I am curious to how exactly this differs from the parent placekey column already included in the monthly patterns. I had assumed that every placekey that has a non-null parent placekey would be considered a shared polygon, but it appears that this is not the case.

[evan-barry-dewey (Evan Barry)]

Shared some SafeGraph docs which should help. It sounds like Shared = the same polygon, Parent/Child = contained polygons.

Geometry | SafeGraph Docs

Geometry | SafeGraph Docs

Advan’s methodology for share polygons is different from the previous SafeGraph data.

SafeGraph <> Advan Methodology Differences

Now that Advan is available on the platform, I wanted so share some methodology differences between the Advan Patterns datasets, and the one previously made available by SafeGraph. No Modeling of Visits/Visitors in Shared Geometries Advan computes the visits/visitors and other metrics inside a POI using the POI’s geometry. If a POI has shared geometry, SafeGraph assigned a subset of the above visits to each POI in the Shared Polygon. Additional historical visitation techniques are listed here.…