The sNDT: A Grid-Based Likelihood Field Approach to Robust and Accurate Sonar Scan Matching Localization Authors: Antoni Burguera Burguera; Yolanda González Cid; Gabriel Oliver Codina. Category: Reports Publication Date: December, 2007 Number/Issue: A-6-2007 Citekey: Burguera-ea:2007d Institution: Departament de Matemàtiques i Informàtica (UIB) Associated Project(s) Ultrasonic Localization and Mapping