LAND USE/LAND COVER MAPPING BY INTEGRATING REMOTE SENSING AND GEOGRAPHICAL INFORMATION TECHNIQUES

摘要

Land is a primary natural resou rce which is required for various purposes like Agriculture, Forestry ,Range land, Water resources Urbanization and many other development activities to satisfy human needs. Since human needs always show and up-ward trend because of increase in improvement in living standards ,so remote sensing data as a tool for planing activities can play an important rule due to rapid in time availability high resolution and low cost product. Remote sensing data in the form of satellite images can be used to study land use/ land cover, to wards preparation of thematic maps depicting various land resources and these maps as an reliable input can be put to a G.I.S. (geographical information system) is describe natural resources both renewable and non-renewable as well as cultural and human resource, the spatial distribution of such phenomena is shown graphically on maps, chart or image alternatively the data may be in the form of list of variable that are grouped by location related places shown on maps the data typically appear as maps and images to describe such things as topography, soil, vegetation, water boundaries etc. This paper reports as practical application, digital analysis of land sat (TM) and IRS satellite data for extraction of land use/land cover maps of an area 11343 km2 including 4 quadrants of land sat images, the resolution of IRS imagery is about 23.4 meters with 3 bands, the different steps involved in this work could be explained as below. 1-Defining a comprehensive legend according to the scale of TM,IRS images. 2-Field checking and necessary modification of the primary maps applying the auxiliary data and extant maps to promote the formation depicted on the land use /cover maps. 3-Measurement of land unit surface by applying geographical information system (GIS) facilities to accomplish the work. the total of 4 TM images have been interpreted is 11 sheet with the size of 50 by 70 cm and geographic coordinate of 30 by 30 minutes were produced. Figure 1.