“INTRODUCTION OF SPATIAL DATABASE SPATIAL DATA TYPES, SPATIAL INDEXING, GEOGRAPHIC INFORMATION SYSTEMS (GIS) & QUERY STRUCTURE”. JournalNX - A Multidisciplinary Peer Reviewed Journal (February 20, 2021): 137–142. Accessed February 17, 2026. https://repo.journalnx.com/index.php/nx/article/view/2048.