Fine Tune Project line

[KevinLam]

I have a project limit that cut some land parcel boundaries. The original design of the project limit should be coincident with the land parcel boundaries. How can I fine tune the project limit programmatically to follow/snap land parcel boundaries to prevent gaps or cross over. Thanks

[DanPatterson_Retired]

why do you need to do it via script? and do none of the overlay tools do what you want?  The latter can be used in python as part of a workflow

[NeilAyres]

Or just use the spatial select tools to select the underlying parcels within and on the edge of your project area, then save them out and dissolve all together to get a project boundary that matches the parcels.