I've recently become interested in geo-extraction; I'm eventually going to work on a project where I'll want to extract street addresses from various text sources (almost exclusively segments of web pages).
That said, would questions about algorithms and approaches to geo extraction be on topic? They would be along the lines of say, trying to find patterns to identify address segments that would later be geocoded to get a latitude/longitude pair.
Note: I am not asking about how to get structured information from what is already known to be an address, but the step before that, finding an address in a body of text.
For example, see geoextractor: