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Relation between image resolution and Z accuracy of derived DTM


nadar

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Does somebody have a good reference on 

- practical results of DEM generation using various types of satellite imagery

- the relation (if any) between spatial resolution) and the accuracy (in elevation) for derived DTM/DSM

- the same question about airborne LiDAR data (relation between points density and accuracy).

 

(I'm preparing a project where DEM accuracy is critical (flooding) and we are hesitating between satellite and airborne LiDAR

All advices and experience are welcome !

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