Improving georeferencing accuracy of Very High Resolution satellite imagery using freely available ancillary data at global coverage
Metadatos
Mostrar el registro completo del ítemAutor
Aguilar Torres, Manuel Ángel; Nemmaoui, Abderrahim; Aguilar Torres, Fernando José; Novelli, Antonio; García Lorca, AndrésFecha
2017-01-19Resumen
While impressive direct geolocation accuracies better than 5.0 m CE90 (90% of circular error) can be achieved from the last DigitalGlobe’s Very High Resolution (VHR) satellites (i.e. GeoEye-1 and WorldView-1/2/3/4), it is insufficient for many precise geodetic applications. For these sensors,
the best horizontal geopositioning accuracies (around 0.55 m CE90) can be attained by using third-order 3D rational functions with vendor’s rational polynomial coefficients data refined by a zero-order polynomial adjustment obtained from a small number of very accurate ground control points (GCPs). However, these high-quality GCPs are not always available. In this work, two different approaches for improving the initial direct geolocation accuracy of VHR satellite imagery are proposed. Both of them are based on the extraction of three-dimensional GCPs from freely available ancillary data at global coverage such as multi-temporal information of Google Earth and the Shuttle Radar Topography Mission...
Palabra/s clave
Remote Sensing, Agriculture