GIS-based extraction of open Space in Rajshahi city

In this paper we present a way to extract features and information from a digitize GIS-based map and for obtaining the open space in Rajshahi city. As we know the environment plays a most vital role for our living, the unplanned use of land can be a great threat to our environment and life. In this respect Geographic information system (GIS) gives us a way to keep track of land use through a digital map. We can capture, digitize, and store information and data in a GIS map. This paper aims to find out the useful data from the GIS based digitize map and analyze the information. After extracting the information a yearly based analysis is made and shows how terribly the number of building in Rajshahi area is increasing day by day since 1931 to 2000. And finally it is tried to make a forecast about the increasing the effect of it.