49-54Web-based GIS is an application having ability to develop the spatial data in Web based softwares. With the help of Web GIS, Hydrometeorological, ecological, hydrological, water quality, land use and other data can be easily made available to the users. The Web GIS softwares i.e. India-WRIS, Bhuvan, Bhuvan Ganga etc play important role to provide useful information to the users. This paper describes the type of web-GIS maps, advantages of web GIS and other related informations. Information availble on Web GIS may be used by policy makers for taking several decisions. Further, Application of Web GIS based knowledge has also been presented in the paper