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Lissages et résolutions

Balades en LAS : 18 mars 2005

La résolution des données disponibles via le LAS est différente selon les jeux de données. Certains, comme les NRT-MSLA sont même proposés en deux résolutions différentes (cf Balades en LAS du 15 juillet 2003 : Une question de résolution). Mais, hormis la finesse des détails, il peut sembler difficile à regarder les cartes, de savoir quelle est la résolution représentée, car le LAS (comme la plupart des logiciels de tracé de cartes) propose un lissage.

Below : Low resolution Sea level anomalies (NRT-MSLA low resolution, 1°) over the Indian Ocean. The area zoomed is plotted with the "Contour fill style" at "smooth" (top), and "raster" (bottom -- "smooth" is the default). With the "raster" version, the pixels of the data are shown with the data resolution.

Below : Same plots with the high resolution sea level anomalies (1/3°). More details can be seen, as well as smaller pixels in the raster version.












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