RESOURCE CATCHMENT AREAS

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining a catchment area for a search result. In one aspect, a method includes receiving search log data specifying a resource that was referenced by search results that were presented to users, query locations for the resource, and whether the users interacted with the search results. A catchment area is determined for the resource based on the search log data, where the catchment area specifies a geographic region for which the resource is a candidate resource. In turn, the resource is indexed according to its catchment area. The catchment area is used in response to receiving a search query that is associated with a particular query location to select candidate search results that reference resources having catchment areas that include the particular query location. Final search results are selected from the candidate search results.