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I'm wondering if I should migrate my existing parcel polygons (stored as a feature class in a geodatabase) to a parcel fabric in ArcMap. What are the advantages of doing this? I work for a county so the parcels are used mainly to store attributes (who owns which parcels in a graphic representation etc.) and general information - NOT for being survey accurate.

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Parcel Fabrics add a lot of overhead to manage. I would say it is worth it IF:
1) you need to manage the legal descriptions of the properties
2) you need the accuracy to be survey grade (which it appears you don't)
3) you need to manage parcel changes over time (subdivisions, boundary line adjustments, etc.)

From a county government perspective, it is really useful for the typical recorder's office, not so much for the assessor's office (who just needs to manage lots of parcel attributes).

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Honestly, you sound like just the kind of person Esri developed parcel fabrics for. I would recommend watching (or at least skimming) this hour-long webinar to see just what you can (and can't) do with parcel fabrics.

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