to extend scope into ownership-pattern or zoning work
The one place Atlas covers ground 4PHILLY doesn't is deeds/sales history, zoning, and council district lookup. If you ever want to extend scope into ownership-pattern or zoning work, those are real datasets - but you'd go to the same primary sources Atlas pulls from (OPA deeds, zoning shapefiles), not to Atlas itself.
Architecturally, Atlas is a peer of 4PHILLY, not an input to it.
Both are presentation layers over the same primary sources.
The difference is that Atlas is built by the data owner and treats the data as authoritative; 4PHILLY is built by an outside methodologist and treats the data as something to be audited.
to extend scope into ownership-pattern or zoning work
The one place Atlas covers ground 4PHILLY doesn't is deeds/sales history, zoning, and council district lookup. If you ever want to extend scope into ownership-pattern or zoning work, those are real datasets - but you'd go to the same primary sources Atlas pulls from (OPA deeds, zoning shapefiles), not to Atlas itself.
Architecturally, Atlas is a peer of 4PHILLY, not an input to it.
Both are presentation layers over the same primary sources.
The difference is that Atlas is built by the data owner and treats the data as authoritative; 4PHILLY is built by an outside methodologist and treats the data as something to be audited.