[UW-GIS-L] how the parcel records are visualized in gis shape file?
gaoj at u.washington.edu
Sun Jul 6 18:39:27 PDT 2008
I have a question on how the parcel records are visualized as gis shape file.
more specifically, i encountered following strange situation:
--(1) i download parcel layer (shape file) from Wagda. As usual, this shape file has a dbf table (attribute table) associated to it.
---(2) I also download EXTR_Parcel table from Accessor's website.
-- (3). In theory, tables from step (1) and (2) should be the same.
HOWEVER, i found some records in the EXTR_Parcel table (from accessor's website) do not match the the dbf table associated with the shape file.
Parcel record with major field=620850, minor field=0000 , DOES EXIST in the "EXTR_Parcel" table
However, when i was about to visualize this parcel in GIS (by using the parcel layer i downloaded from Wagda), i found that, the dbf table of the parcel shape file (from Wagda) DOES NOT contain any parcel record with major field=620850 at all !!!
Similar cases are: major field=679130; major field=639165; similar cases are around 120 cases.
Any Ideas on how could this ever happen? -- that is, how come some parcel recordes in EXTR_Parcel table, with explicite major and minor fields, do not have any correponding recordes in the dbf table of the Parcel shape file?? where have those parcels gone on the map then?
any input would be greatly appreciated !!
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