The explanation of a systematic restitution error in Z causing more than one headache. 2004.

An analysis of the relationship between the ground, the tilted photograph and the vertical photograph, considering angles on the photograph, shifts and the rotation matrix. 2004-2005.

A clear and motivated explanation of the definition of the p.p. of best-symmetry and the optimum phocal length, based on the distortion along the diagonals, plus an introduction to tangential distortion. 2004.

Deffinitive essay on a camera's geometric distortion, including the proposal of a universal (valid for any camera) development in rectangular harmonics. 2005-2010.

Analysis of the rotation matrices: their properties, parametrizations and linearization. 2008-2014.

Overview of orientation parameters, vertical and oblique photograph, the model, distortion and the generation of epipolar images. 2008.

Explanation of geocentric, geographic and cartographic proyection coordinates; Geoide ondulation and trasformation to a local system. 2008.

Concise introduction to projections, focusing in conformal projections. Includes the formula for the UTM k coefficient for the WGS84 ellipsoide. 2008.

A seemingly simple task such as the computatino of a similarity transformation parameters is not actially so, and among the many different possibilites that arise only one is optimum. Tratamiento de la semejanza en el plano y en el espacio, con aplicación al paso de coordenadas geocéntricas a locales. 2008.

It deals with the different steps in an ortophoto generation: Transforming the coordinates to a local system, resampling and radiometric adjustment, as well as difficulties that may arise during the process. 2008.

This paper is dedicated exclusively to the computations needed for the generation of the epipolar images out of the original ones. An example is developed in full. 2009.