O.k., that works too.  I see similarities between these maps, though the local assessor's office will be more current.  For that reason, I prefer to use assessor's info where I can.  Besides, so much more detail is available on private ownerships - parcel size, owner's names, mailing addresses, tax information, etc.  Usually, too, finding the parcel number can lead to finding other information such as the sales history on a parcel, historical tax payments or foreclosures, and sometimes even the zoning information.  It all depends on the county.