GeoPQL(The Geographical Pictorial Query Language) is a system able to formulate visual queries of increasing complexity, utilizing a minimum time and with the certainty of always true results, characterized by a very high precision (these last two things are, obviously, function of the data quality stored in the geographical database used).

References in zbMATH (referenced in 2 articles , 1 standard article )

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  1. D’Ulizia, Arianna; Ferri, Fernando; Formica, Anna; Grifoni, Patrizia: Approximating geographical queries (2009) ioport
  2. Ferri, Fernando; Rafanelli, Maurizio: GeoPQL: A geographical pictorial query language that resolves ambiguities in query interpretation (2005)