By default, GeoPlanet returns the most likely place matching a query for the places collection. The probability for a place is based on the frequency that place is mentioned in recent news articles from around the world. You can boost the probability for places within a specific country using the second parameter of the q filter. Add the ISO-3166 alpha-2 country code to the q filter. Since the second parameter is separated from the first parameter by a comma, the first parameter must be enclosed in double quotes if it contains a comma. Note that while probabilities for place in the country may be boosted, some places in other countries may have even higher probabilities and returned instead.