How to update existing vocabulary?

Hi,

I just installed the 'Feeds' and 'Geo Taxonomy' and would like to add geo data to an existing vocabulary with 850 terms (= named locations, so far without georeferential data). Of course I don't want to copy and paste the geodata manually into the term fields, so I was hoping that the combination with 'Feeds' would enable me to accomplish this (semi) automatically. Meaning: In the worst case, I'd have to confirm for all 850 terms that the geodata matches the term.

Following the README.txt is pretty straight forward up to the point where ist ends: "Edit the mapping of the Taxonomy term processor and map which sources should map to which geo fields. The available sources are going to depend on the parser that is selected." However, there is no geo data to map to anything ("No mappings defined"); where do I enter a source feed, or how do I get latitude and longitude information from a source, e.g. Wikipedia, into my vocabulary?

According to ./admin/build/feeds/edit/geo_taxonomy/settings/FeedsTermProcessor, it should be possible to "Update existing items" (option is checked). I assume, that the only supported input format requires "a local file" as fetcher, and this "local file" has to be formatted exactly as taxonomy requires, so no real parsing/matching is done, right? Meaning, if I don't have something like a CSV file with georeferential data for my terms, this module doesn't help at all to get geodata into taxonomy?

Thanks & greetings, -asb