Presentation index for extracting wheat under cultivation by remote sensing data

The purpose of this research is extracting wheat under cultivation in the northern suburbs of Hamedan province. This area is recognized as one of the important poles of wheat product in Iran. To appoint an appropriate time and acquisition satellite data، it’s used the agricultural basis studies and cultivation calendar of different corps، and the spots of 2005 have been acquisitioned in 2 times. In three levels of sampling، it’s gathered comprehensive information about wheat under cultivation. Wheat under cultivation has been shown by RGB CHANGE DETECTION algorithm. Wheat index was extracted by using normal difference in similar bans. Although in these index wheat under cultivation were identified with value more than zero، another crops have negative value.