Orthorectification Using Rational Polynomials

You can orthorectify certain types of satellite images that are supplied with a mathematical model of the image geometry in the form of a set of rational polynomial coefficients. This procedure also requires a digital elevation model. You can often improve the fit of the rational polynomial model to a particular image by regeoreferencing the image using accurate 3 D ground control points.

navigate.jpgAbout Rational Polynomial Models

navigate.jpgAcquiring a DEM

navigate.jpgElevation Units and Reference Surfaces

navigate.jpgObtaining the Geoid Height

navigate.jpgRegeoreferencing the Image

navigate.jpgGeoreference with RPC Model

navigate.jpgControl Points from GPS Survey

navigate.jpgEvaluating Control Points