The entire district is situated in the Ganges Delta and the eastern part of the district is a flat plain area with small towns, many in clusters. Location of places in the larger map varies a little.
This description highlights that the district is located in the Ganges Delta, specifically its eastern part, which is a flat plain area with many small towns.  The arrangement of these towns is often clustered together. The location of specific places within this district may vary slightly on a larger map.