I am working with both the postal and Geonames data for Germany. I noticed that while the Postal data may be used as a lookup for ADMIN_CODES 1-3 (ADM1,ADM2,ADM3), it does not mention ADM4 at all.
Does anyone know where to find the lookup table for 'admin4_code' values?
According to http://forum.geonames.org/gforum/posts/list/538.page, this admin code references a 'Gemeinde', an admin field I would like to include in my work, if possible.
The German dataset I'm working with: http://download.geonames.org/export/dump/DE.zip
The German dataset I'm using as a lookup table for ADMIN CODES: http://download.geonames.org/export/zip/DE.zip
Both zipped folders contain a 'readme.txt' file that outlines the fieldnames in the data.
I am also tracking this question on the Geonames forum: http://forum.geonames.org/gforum/posts/list/2623.page