In the frame of remote sensing process, one common operation is to be able to superpose and manipulate data which come from different sources. This section gives access to a large set of geometric operations. It performs re-projection and orthorectification operations on Optical or SAR dataset using the available sensor models (image informations available in the meta-data are automatically read by the application).
The application is derived from the otbOrthorectificationApplication in the OTB Applications package and allow to produce orthorectified imagery from level 1 product. The application is able to parse metadata informations and set default parameters. The application contains 4 tabs:
This module allows to take ground control points on a raster image where no geographic informations are available. This GCPs list is making correspondence between pixel coordinate in the input image and physical coordinates. The list allows to derive a general function which convert any pixel coordinates in physical positions. This function is based on a RPC transformation (Rational Polynomial Coefficients). As a consequence, the module enriches the output image with metadata informations defining a RPC sensor model associated with the input raster. There are several ways to generate the GCPs:
It is also possible to import/export the list of Ground Control points from/to an XML file.
Moreover, if the input image has GCPs in its metadata, the module allows to add or remove points from the existing list, which is automatically loaded.