Explanations for ETM-subsets

What kind of information is displayed?

This image is a subset of a Landsat 7 ETM+ image, covering a size of about 30 km by 25 km, which was acquired during the rainy season. It is visualized as a so-called false colour composite. On the Red, Green and Blue channels the spectral bands 4: NIR (near Infrared), 5: MIR1 (Mid Infrared 1) and 3: visible red of the Landsat ETM+ sensor are displayed (RGB: 4-5-3).This band combination suits best for a detailed visualization of different land cover properties. Due to that, the displayed colours are not natural.

In general, the colours refer to the following land cover types:

• Dark Blue: Water bodies, dams and lakes without Algae.

• Light Blue: in populated places mainly buildings, outside of towns mainly rocks, and very sparsely vegetated soils.

• Red: Very dense and vital vegetation like bush thickets, forests or planted fields, in towns: gardens.

• Green: "middle dense" or less vital vegetation, like grass savanna (light green) and dry bush (dark green).

• White: bare soil or sparsely vegetated areas, independently from the natural soil colour, also gravel roads and pads.

• Intermediate colours are representing mixed pixels with information of several land cover types.

E-Mail to Manfred Keil (subproject leader)