جداسازي سنگ شناسي آذرين پي (گرانيت و گرانوديوريت) در منطقه شيركوه يزد به كمك سنجش از راه دور (RS) و سيستم اطلاعات جغرافيايي(GIS)

Main goal in this article is presenting a new method to separate the vary lithologies from granite and granodioritic rocks, applying Remote Sensing (RS) and Geographic Information Systems (GIS), with the least error within a local geological area of Shirkooh-e-Yazd. All the analyses are based on the Landsat satellite image of the studied area. To do so, the chosen formatted images is converted into the RS and GIS formats. Applying the local image bands composition, a seven band color image has been presented. Fusing the color imaged into the pan bands ones, a new image has been produced with the segregating distance ability of 15 meters. The image geometry has been corrected by the local pointʹs measurements of GPS in a very accurate position. Different band created colored image was able to separate the lithology within the studied area precisely. The separated lithology of granite and granodiorite were also tested by both supervised and unsupervised classification method. The unsupervised classification was applied in 6, 8, 10 different bands to find the best separation resolution. Also supervised classification has been applied by choosing some areas as controlled locations, where also have been located by GPS. Comparing the different results merged from different methods, e.g. classification and interpretation ones, illustrate the possible important errors in the extracted results. In the last step, a very precise map based on the igneous lithology has been presented.