miércoles, noviembre 30, 2011

Nuevo Modelo de Elevación digital Global


El Servicio Geológico de los Estados Unidos, junto con la National Geospatial-Intelligence Agency (NGA) han efectuado una nueva versión de un DEM global (digital elevation model).

El nuevo dataset se denomina Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) y la mejora respecto a los modelos de elevación anteriores es apreciable.

"The GMTED2010 product suite contains seven new raster elevation products for each of the 30-, 15-, and 7.5-arc-second spatial resolutions and incorporates the current best available global elevation data. The new elevation products have been produced using the following aggregation methods: minimum elevation, maximum elevation, mean elevation, median elevation, standard deviation of elevation, systematic subsample, and breakline emphasis. Metadata have also been produced to identify the source and attributes of all the input elevation data used to derive the output products. Many of these products will be suitable for various regional continental-scale land cover mapping, extraction of drainage features for hydrologic modeling, and geometric and radiometric correction of medium and coarse resolution satellite image data."

Para buscar y descargar sin costos los datos, se puede visitar los siguientes sitios:



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