There are different projects that have been created to collect place information of special interest to the blind, such as tactile pavement, audible traffic lights etc. Unfortunately Foursquare POI-data may only be used separately from POI-data of other sources.
As BlindSquare may not query different resources for POI-data at the same time, it cannot currently access these specialized resources.
We may introduce an option in a future version that lets the user select resources to be queried for POI-data. Although BlindSquare does currently use both Foursquare and Open Street Map data, it only downloads street map data and no information about other points of interest from Open Street Map.