Image:P217r75 5t19930624 bicas rgb bandas 341.png

LANDSAT5 Satellite View of Bicas,Minas Gerais,Brazil in 1993-06-24 (RGB=bands 3,4,1 - green channel in near infrared), with 30m resolution per pixel and red channel reinforcement filter applied. In this composite, the dense vegetation is green, strongly contrasting with the deforested areas and grass, in natural red. It is not difficult to visualize the road BR-267, as a thin dark line to the west of Bicas, coming eastwards across the village of Santa Helena (red), south of Bicas and on, and also a winding red line to the north of Bicas which is a road leading to the city of Rochedo de Minas. The areas in strong purple/orange hues correspond predominantly to human artifacts (buildings, houses, roads) and naked land areas, respectively. The city of Bicas shows as a purple spot in the middle of the image, and the neighbour city of Guarará links to the southeast of Bicas as a thin "half-moon". The orange spont in the middle of Bicas is the top of the "Alto das Brisas" hill, where there is a large proportion of naked land. Other light purple spots probably are other locations of mineral extraction with naked land areas. This picture covers roughly 14400m west-east and 10800m north-south. The centre of the picture is located around Latitude 21S43'20 / Longitude 43W03'30.

Source: http://glcf.umiacs.umd.edu/data/landsat/ The source for this composite picture was the "Global Land Cover Facility", http://www.landcover.org. Publisher: U.S. Geological Survey. Intellectual Property Rights: USGS & NASA; use is free to all; The U.S. Government holds the ultimate ownership. See USGS Citation for further details. http://edc.usgs.gov/about/customer/citation.html

The individual band frequencies 3,1,2 corresponding to the RGB colors, with resolution of 30m per pixel (according to the band specifications of the TM sensor (http://www.eurimage.com/products/landsat.html) of the LANDSAT5 satellite (http://landsat.gsfc.nasa.gov/education/compositor/), { Band Number Wavelength Interval Spectral Response 1 0.45-0.52 µm Blue-Green 2 0.52-0.60 µm Green 3 0.63-0.69 µm Red 4 0.76-0.90 µm Near IR 5 1.55-1.75 µm Mid-IR 6 10.40-12.50 µm Thermal IR 7 2.08-2.35 µm Mid-IR }), were made available by the source above, for free use, in the address http://glcfapp.umiacs.umd.edu:8080/esdi/ftp?id=14492 (also in ftp://ftp.glcf.umiacs.umd.edu/glcf/Landsat/WRS2/p217/r075/p217r75_5t19930624.TM-EarthSat-Orthorectified/).

and then further processed by Marcus Cunha Granado (filtering, clipping, band composition), resulting in this picture from the personal archives.

METADATA FILE (ARQUIVO p217r75_5t19930624.met)

IMAGE_ID P217R75_5T19930624 PATH 217 ROW 75 DATE 1993/06/24 FILE_FORMAT GEOTIFF DATA_FORMAT BYTE ROW_COUNT 7866 COL_COUNT 8377 ROW_START 1 COL_START 1 PLATFORM LANDSAT5 SENSOR TM PROJECTION UTM23 DATUM WGS84 UNITS METERS X_START 5.7701100000E+05 Y_START -2.2869255000E+06 X_INCREMENT 2.8500000000E+01 Y_INCREMENT -2.8500000000E+01

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• Bicas