1. A system, comprising: geographic data; category data organized according to a hierarchical category index; categorized data comprising at least one item associated with each of the geographic data and the category data; and a server device that is configured to provide the hierarchical category index to a client, and to further provide to the client, in response to a query that includes a geographic area of interest and a category of interest, a list of items that includes all of the items in the response, wherein, upon receipt by the client and without user intervention, each item included on the list of items is included in a map display in the client, the server device being further configured to receive as part of the query a search term provided as a category input and an item term provided as an item input, and to use the item term to search for items to be included in the response if the search term provided as a category input does not yield a result.