title: approximate query processing using wavelets vldb j.. authors: rajeev rastogi , minos n. garofalakis , kyuseok shim , kaushik chakrabarti. venue: nan. year: 2001.0
title: a raster approximation for processing of spatial joins very large data bases. authors: geraldo zimbrao , jano moreira de souza. venue: nan. year: 1998.0