Selection of GCPS for HR and VHR satellite images in the framework of control with remote sensing
2006
Szöcsová, I.,Soil Science and Conservation Research Institute, Bratislava (Slovak Republic) | Scholtz, P.,Soil Science and Conservation Research Institute, Bratislava (Slovak Republic)
The paper is dealing with the problem of the specification and appropriateness of potential and available features for GCPs to fulfil the requirements defined by the European Commission (EC) in the framework of control with remote sensing in the area-based subsidies. Ground control points (GCPs) are the key inputs of the geometric correction process of satellite data.The quality requirements of the GCPs depend on the spatial resolution of the geometric corrected image. The most appropriate option for high resolution (HR) images is the collection of GCPs from large scale orthophotos. For VHR imagery, where in general the target specification is less than 2.5 m RMSE1 d, only the GCPs with a specification of more than 0.8 m RMSE are suitable.
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