Need text file of cities + GPS coordinates + population

I need a master list of cities from across the world with latitude, longitude and population size. This information is available in some sort of an existing database and should include hundreds of thousands of cities (which you must find and export). Your deliverable should be in the following format: CITY - LAT - LONG - POPULATION SIZE As an example, ALPHARETTA - 34.122744 - 84.296757 - 157860 (Those are only sample coordinates and not exact.) The population data will be used to classify cities, for example - SMALL, MEDIUM, LARGE. ## Deliverables CITY - LAT - LONG - POPULATION SIZE, as well as in a CSV format of CITY,LAT,LONG,POPULATION SIZE One per line. ## Platform Flat text file.