1. A method, comprising: determining, by one or more processors in one or more server devices, one, of a plurality of geographical areas in a grid, associated with a document; determining, by one or more processors in one or more server devices, a subset, of the plurality of geographical areas in the grid, each of the subset being at least partially within a circle of a particular radius from the one, of the plurality of geographical areas, associated with the document; and indexing, by one or more processors in one or more server devices, the document to include the one, of the plurality of geographical areas, associated with the document and the subset of the plurality of geographical areas.