Rectification Methods Based on Line Features for SPOT Imagery

Abstract:

This paper discusses the problem of the accurate geometric correction based on line features for SPOT imagery.On the basis of researching the use of SPOT images’ ephemeris parameters,satellite ephemeris parameters are proposed to be adopted to determine initial parameters of correction model.Then,accurate parameters are obtained by means of iterative calculations,while the linear equations are used as the set of constraint conditions for the correction model,and precise correction of SPOT imagery is achieved by using the accurate parameters of the correction model.The experimental results show that the geometric correction method of SPOT imagery based on line features can meet the accuracy of digital orthophoto in 1∶50000.

Key words:SPOT images; ephemeris parameters; linear model for rectification; geometric correction