Artigo
DIGITAL ELEVATION MODEL VALIDATION WITH NO GROUND CONTROL: APPLICATION TO THE TOPODATA DEM IN BRAZIL
Registro en:
Boletim De Ciencias Geodesicas. Curitiba Pr: Univ Federal Parana, Centro Politecnico, v. 20, n. 2, p. 467-479, 2014.
1982-2170
10.1590/S1982-21702014000200027
S1982-21702014000200027
WOS:000337892200014
S1982-21702014000200014.pdf
Autor
Polidori, Laurent [UNESP]
El Hage, Mhamad
Valeriano, Marcio De Morisson
Resumen
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 statistical indicators are computed, and they show that the quality of Topodata in terms of shape rendering is improved with regards to SRTM. CNAM L2G, F-72000 Le Mans, France UNESP, Dept Cartog, BR-19060900 Presidente Pudente, SP, Brazil CNRS, Beirut 2260, Lebanon INPE DS, Sao Jose Dos Campos, SP, Brazil UNESP, Dept Cartog, BR-19060900 Presidente Pudente, SP, Brazil