Mulwafu, Lwitiko How good is Openstreetmap ? a comparative study of openstreetmap and malawi survey data sets : case study of lilongwe city / by Lwitiko Mulwafu - Luwinga, Mzuzu : Mzuzu University, 2014 - ix,26 p. : ill. ; 29.5 cm - BSLM/20 . includes references ISBN: 004142 Subjects--Topical Terms: openstreetmap