RT info:eu-repo/semantics/conferenceObject T1 Radiometric calibration and evaluation of ultracam X and XP using portable reflectance targets and spectometer data. Aplication to estract thematic data from imagery gathered by the national plan of aerial orthophotography (PNOA) A1 Álvarez Taboada, María Flor A1 Catanzarite Torres, Tainy A1 Rodríguez Pérez, José Ramón A1 Nafría, D. A2 Ingeniería CartograficaGeodesica y Fotogrametria K1 Cartografía K1 Radiometría K1 Calibración K1 Plan Nacional de Ortofotografía Aerea (PNOA) AB Digital photogrammetric cameras obtain multispectral images with a high geometric accuracy and radiometric information which can be used for multiple purpose. The optimal use of this information requires a calibration and validation of the photogrammetric systems. Calibration is the process of defining the sensor response quantitatively to a known and controlled input signal. YR 2013 FD 2013-06-19 LK http://hdl.handle.net/10612/2741 UL http://hdl.handle.net/10612/2741 NO EuroCOW, 2010, Castelldefels, España DS BULERIA. Repositorio Institucional de la Universidad de León RD 18-abr-2024