Adm2 for Gran Buenos Aires

The partidos for Gran Buenos Aires (GBA) don't seem to match up completely with Census 2010 for Argentina. One example is partido Morón. It is broken into 3 partidos (Morón, Hurlingham, and Ituzaingó) on wikipedia and anywhere else I search for the GBA partidos. There are other examples too such as General Sarmiento being 3 partidos in other sources. They also seem to be generally shifted based on comparing the shapes to the Reference/World_Boundaries_and_Places layer of http://services.arcgisonline.com/arcgis/services.

I need to use the shapes in a shapefile to join to census data so I can't just use the webservice. If there is another official source, that would be helpful too.

Thanks!

Adm 2 for Gran Buenos Aires

Hello,
You can download updated adm2 boundaries for Argentina from here
http://www.aeroterra.com/d-argentinagral.htm
I found that these boundaries are a good match for the 2001 and 2010 censuses. You can also contact costumer services at INDEC (ces@indec.mecon.gov.ar).
Hope this helps,
Susana Adamo