Lake Débo and Walado Débo, one of the major Sahelian wetlands is located in Inner Delta (Mali). Given the environmental and community interest in this wetland, there is urgent need to share spatial data on natural resources. Most of the covered information is published in (internal) reports with a limited distribution. With the advent of GIS and Internet technologies, the conventional intricacies to get solutions in time and position have been improved. The combination of Web technologies and the power of GIS software enable natural resource managers to analyze GIS data that resides across the Internet. This paper is based on the design and architecture of a Web-based GIS to managing flooded pastures. MapGIS IGS (MapGIS Internet Server) is used to provide a user-friendly GIS front-end for natural resource managers and public users to perform routine GIS functions on geographic data that are distributed across the Internet. Internet based geographical data services involve management spatial data. Geographic Information System (GIS) is an indispensable tool for analyzing and managing spatial data.