Remote Sensing: Koeroegap Vlakte

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 the displayed image the BIOTA observatory is given as a dotted rectangular box of 1km x 1km extension. 

 View Observatory

Koeroegap Vlakte

 WRS2 Path-Row


 Acquisition Date


 Image Details

The geology, topography and vegetation in the Richtersveld Mountains are highly diverse. This is indicated by the mosaic of different colours in this image. The observatories Koeroegapvlakte (North-East) and Numees (South-West) are located in plains with a more or less continuous vegetation cover (red tones) of succulent shrubs. Along the Orange River bed (North-Eastern and North-Western border of the image) riverine forests and agricultural fields (both intense red) are visible. 

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)