Thursday, February 3, 2005

Finding concordance between 2001 DAs and 1996 EAs

Question

We compiled the total population in 2001 by provincial electoral district in working with DAs (dissemination areas). In order to calculate population increase by provincial electoral district between 1996 and 2001, I need to compile population by provincial electoral district in 1996. Therefore, I would need the concordance between DAs in 2001 and EAs (enumeration areas) in 1996, because DAs didn't exist in 1996. Does such a tool exist? Or has anybody an idea about how I can calculate in another manner the population increase between 1996 and 2001 by provincial electoral district?

Answer

The version of GeoSuite on the DLI FTP site contains the EA to DA correspondence table. After you install GeoSuite, you'll find in its directory two files: ea-sd_corr.mdb (which is an MS Access database) and ea-sd_corr.txt (which is an ASCII text file that is actually in CSV format). The heading of the fields in these files are: 1996EAuid, DAuid, PartFlag, BLOCKuid, EApop1996, EApop2001.

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