Digital elevation model validation with no ground control: application to the topodata dem in Brazil

Laurent Polidori, Mhamad El Hage, Márcio De Morisson Valeriano
2014 Boletim de Ciências Geodésicas  
Digital Elevation Model (DEM) validation is often carried out by comparing the data with a set of ground control points. However, the quality of a DEM can also be considered in terms of shape realism. Beyond visual analysis, it can be verified that physical and statistical properties of the terrestrial relief are fulfilled. This approach is applied to an extract of Topodata, a DEM obtained by resampling the SRTM DEM over the Brazilian territory with a geostatistical approach. Several
more » ... Several statistical indicators are computed, and they show that the quality of Topodata in terms of shape rendering is improved with regards to SRTM.
doi:10.1590/s1982-21702014000200027 fatcat:ncul46kcofb5tnc75lv63njll4