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 Toggekry (S04) - Remote Sensing
Explanations for ETM-subsets

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.
Satellite Image
Observatory Toggekry (S04)
Info In the displayed image the observatory is given as a dotted rectangular box of 1km x 1km extension.
WRS2 Path-Row 178-75
Acquisition Date 17.05.2000
Image Details Both observatories are located in the central Namibian mixed thorn bush savanna. The landscape is a “homogeneous heterogeneous” mosaic of patches with dominating grass vegetation (green) or higher densities of trees and shrubs (red). Densities may vary over time. Recent grazing impact is visible due to lower vegetation densities in brighter or bluish patches. Reddish colours of the Ombotozo Mountain in the south are rather induced by geology than by vegetation density.
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.