Land use, land cover changes detection in Rasht city using Arc GIS and ERDAS

In this study, at first using a library and documentary study, physical expansion and population trends of Rasht city in different periods of history were identified. Then land use map between 1990 and 2010 in Arcgis 9.3 based to the existing data in the first comprehensive city plan, field studies of the first comprehensive city plan was rebuilt as possible. By coding each of the applicable and transfer shapefiles (maps folder) to ERDAS software medium and converted vector layers to raster and application of orthogonal tables, three periods of land use were compared. By creating similar tables for the entire city, percentage of land use changes in all three periods were specified and by evaluation of the rate of each changes separately by structured land use and nonstructured land use, the trend of their range and its quality and quantity were determined.