Automatic digital photogrammetry in geomorphology: Data collection and quality at multiple spatial scales
- Autores: Damià Vericat Querol, M. Smith, E. Muñoz Narciso
- Localización: Avances de la Geomorfología en España 2012-2014 / coord. por Susanne Cecilia Schnabel, Álvaro Gómez Gutiérrez, 2014, ISBN 978-84-617-1123-9, págs. 351-354
- Idioma: inglés
- Títulos paralelos:
- Aplicación de fotogrametría digital automatizada en geomorfología: Obtención de datos y análisis de errores a múltiples escalas
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Resumen
In this paper we present preliminary results of work which aims to assess the quality of point clouds obtained by means of automatic digital photogrammetry (Structure from Motion) using panoramic and zenithal images of the same location. Point clouds are compared with those obtained by means of Terrestrial Laser Scanning (considered the true ground surface). Data are from an experimental badland located in the Upper River Cinca, where erosional processes are studied at multiple temporal scales in relation to rainfall and surface roughness. Results indicate that new methodological approaches and technologies may reduce substantially the time involved in survey data collection, although specific data acquisition designs are required to ensure data at standards required to achieve project objectives. The ground control network is a key component in these designs, although displacement vectors larger than 5 cm are expected in more than half of the survey observations when are compared to TLS-based point clouds.
