https://ria.asturias.es/RIA/handle/123456789/5721 Thu, 18 Dec 2025 11:54:18 GMT 2025-12-18T11:54:18Z https://ria.asturias.es/RIA/handle/123456789/6201 Title: Taller de procesamiento de trayectorias cinemáticas de sensores aerotransportados en RPAS Authors: Cuadrado Méndez, Oscar Tue, 07 Apr 2015 00:00:00 GMT https://ria.asturias.es/RIA/handle/123456789/6201 2015-04-07T00:00:00Z https://ria.asturias.es/RIA/handle/123456789/6882 Title: Spatial modelling of organic carbon in burned mountain soils using hyperspectral images, field datasets, and NIR spectroscopy (Cantabrian Range; NW Spain) Authors: Fernández, Susana; Peón, Juanjo; Recondo, Carmen; Calleja, Javier F.; Guerrero, César Abstract: Soil organic matter is seriously affected by fires and suffers changes in stock, composition, and distribution. In the North West side of the Cantabrian Range (northern Spain) fires are very common. In order to develop a cartographic technique to map areas with high carbon stocks caused by fire, we test a technique based on calibrated VIS NIR soil organic carbon models and hyperspectral images. Total (TOC) and oxidizable carbon (OC) were measured in 89 soil samples. The samples were scanned with VIS NIR spectrometer (400-2500 nm) and the spectra were resampled to the hyperspectral image channels. Spectroscopic models for TOC and OC were fitted (R2 > 0.81) using partial least squares regression (PLSR). The predictions were regionalized to the hyperspectral image and the results validated with a new soil population consisting of twelve Valeri plots collected in burned slopes of the study area under heather vegetation. In soil samples, TOC and OC values are highly correlated (R = 0.92) and the coefficients of the PLSR models have a similar pattern, which suggests similar organic components. Nevertheless, there are significant differences in the values of the regression coefficients, much higher in the TOC model except at 560 and 2054 nm that might be interpreted as labile carbon components, and at 1590 nm. At this wavelength the coefficient of TOC is positive and OC is negative, and it could be interpreted as hydrocarbons components present in the TOC model. Thu, 01 Jan 2015 00:00:00 GMT https://ria.asturias.es/RIA/handle/123456789/6882 2015-01-01T00:00:00Z https://ria.asturias.es/RIA/handle/123456789/7687 Title: Restauración de cartografía antigua mediante procesado de imagen. Producción Ortofotografía Histórica Authors: Silverio García Cortes; Oscar Cuadrado Méndez; David Díaz Álvarez; Diego González Méndez Abstract: Since the middle of the last century, public administrations have been conducting photographic flights in order to meet the needs of a variety of different departments. The great value of such documentation is safeguarded and supported by a number of regional and national projects such as the PNOA (National plan of Aerial Orthophotography) Historical Project The aim of this project was to develop a methodology for the production of orthophotographs based on historical photographs using the latest photogrammetric tools in order to minimize the personnel involved in the manual phases of the project as well as to reduce production times. There have been several tests of new photogrammetric tools based mainly on techniques such as SFM (structure from motion), with its origins in computer vision, creating new possibilities to streamline the production process as a whole. Commercial tools like Smart3D capture, 3D flow, Autodesk 123D, Photoscan Pro, Pix4d, in addition to free software tools like Bundler, VisualSFM, OpenCV orMatlab libraries allow for the acceleration of the production process in the relative orientation phase. However, the problem of manual identification of control points in order to control points in order to control all of the variables of an adjustment block, camera aberrations, film deformation and scanning, among others, still remain. Thanks to the digital processing of existing historical cartographic products generated from photogrammetric flights using orthorectified lenses, the task of identifying checkpoints in current cartographic products of higher resolution are provided which help determine the calibration parameters of unknown cameras. Using this methodology, our intention is to initiate an ambitious project in order Thu, 27 Oct 2016 00:00:00 GMT https://ria.asturias.es/RIA/handle/123456789/7687 2016-10-27T00:00:00Z https://ria.asturias.es/RIA/handle/123456789/6161 Title: Recomendaciones técnicas para la planificación y ejecución de redes geodésicas de ámbito regional o local en el Principado de Asturias Authors: Cuadrado Méndez, Oscar Wed, 20 Sep 2006 00:00:00 GMT https://ria.asturias.es/RIA/handle/123456789/6161 2006-09-20T00:00:00Z