Specifically, isobathytherms are strains displaying depths of drinking water with equivalent temperature, isohalines show lines of equal ocean salinity, and isopycnals are surfaces of equivalent water density. An isohyet or isohyetal line (from Historical Greek ὑετός (huetos) 'rain') is usually a line on a map joining points of equivalent rainfall https://contoursurveyinbangladesh31471.blogzag.com/76395999/detailed-notes-on-contour-survey