The Utilization of Satellite Imagery for Vegetation Studies & the Comparison of various Vegetative Indexes
Parang, Soran1; Shahrokhi Shahraki, Hamed2; Jalilzadeh Shadlouei, Amin1
1University of Tehran, IRAN, ISLAMIC REPUBLIC OF; 2Concordia University, CANADA
Nowadays gaining knowledge regarding vegetation and its health plays an important role in soil management. To investigate the vegetation in the global and regional scales, on-time access to field data is often difficult and limited. Also, the assessment of vegetation with the usual method of a general assessment of the vegetation apart from being so time-consuming does not result in precise information. Hence, the more efficient remote sensing technology characterized by (for instance) providing a vast and integrated field of vision of the region, repeatability, easily accessible and highly precise information and saving of time is preferred over other methods. The synthesis of the results of the farm observations and measurements with the data obtained through remote sensing can render on-time maps of the features of the agricultural products; this in itself is of high value in defining precise managerial units. The vegetation indexes, utilized today in large scales, can also be employed for the quantification of the annual net production in various global scales and the partitioning of vegetation in continental, global and regional scales. In the current research, in order to find a quick method with an acceptable level of precision for the recognition and classification of vegetation, satellite imagery and different vegetation indexes have been utilized; and by comparing the results of the different classification methods and the application of various vegetative indexes on the imageries, the advantages and disadvantages of various vegetative indexes have been investigated.