Isohyet

An Isohyet is a line on a map connecting places having equal rainfall. This map was taken off of the Hong Kong weather website.
http://images.google.com/imgres?imgurl=http://www.weather.gov.hk/informtc/prapiroon/prapiroon_rf.gif&imgrefurl=http://mattsmapcatalog.blogspot.com/2008/08/isohyets.html&usg=__O7ui_GZGohVPX7UR1Qs8KY-lnjE=&h=464&w=618&sz=110&hl=en&start=2&um=1&tbnid=YdSIw7iwfBwsuM:&tbnh=102&tbnw=136&prev=/images%3Fq%3Disohyet%2Bhong%2Bkong%26um%3D1%26hl%3Den%26rls%3DSUNA,SUNA:2006-04,SUNA:en