Hi Marc:
How are you? Many time without talking with you. I hope you are fine.
Is there any way in the database tables, of knowing wich data are more importan?
For example:
If I search "railroad station madrid" in www.geonames.org, the first railroads are Atocha and Chamartin (more importants). Can I do the same feature reading data from the tables?
In general the relevance depends on a lot of factors like featurecode, population, elevation, etc. For Stations you can take the presence of a wikipedia link as an indicator.