Resumo

FRANCA, Andreia Maria da Silva  e  SANO, Edson Eyji. Humid grassland mapping at Distrito Federal, Brazil, using fusion of multispectral images. Soc. nat. (Online) [online]. 2011, vol.23, n.2, pp. 197-209. ISSN 1982-4513.  http://dx.doi.org/10.1590/S1982-45132011000200004.

Wetlands are among the most important ecosystems on the earth. Despite the importance of these ecosystems, there are few studies and data regarding their location, extent and other basic characteristics. In this study, the mapping of these ecosystems was realized by means of multispectral image fusion - Landsat5/TM and CBERS2B/HRC. Images from May to October of 2008 (dry season) were merged by IHS enhancement technique. Results showed that there was an improvement in the identification of areas occupied by humid grasslands since there was an gain in the discrimination of targets once there was an integration of higher spatial resolution of panchromatic band with higher spectral resolution of other bands. The map of distribution of humid grasslands indicated a total of 8,46 km² located essentially in conservation units.

Palavras-chave : Humid grasslands; Mapping; IHS enhancement technique; Quantify.