Digital Terrain Modeling Using SPOT Imagery

Digital Object Identifier 10.32754/JMT.2019.2.09 53 1Abstract—Platforms with high-resolution recording sensors are an excellent source for anefficient, economical and accurate generation of the terrain numerical model. The most difficult problems associated with generating the numerical model of the terrain are the correlation and the establishment of the mathematical model that describes the relationship between the scene coordinates and the object coordinates. Both rigorous and approximate models can be used to describe this relationship. Rigorous modeling requires accurate knowledge of image geometry; inner and outer orientation parameters are explicitly involved. Determining these features requires control information that can be in the form of control points, and / or navigation units. However, determining these parameters can be hindered by the lack of sufficient control information, poor image geometry and/or by the provider's secrecy of these parameters. That is why there has been and still is an increased interest within the photogrammetry community for adopting approximate models; their feature being that such models donot imply any exact knowledge of the image geometryorof the internal and external characteristics of the sensor. Parallel projection is one of the approximate models that has gained popularity due to the simplicity and precision of the representation of the projection perspective characteristic of the scenes taken with sensors with a narrow angle of view that move with constant speed and orientation.