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What is high resolution satellite data?
Quickbird is a satellite with a sensor delivering high resolution images. Such highest resolution satellite images are - in
their spatial detail - nearly comparable to air photographs. Quickbird acquires images in a multispectral (colour) mode and
in a panchromatic (black and white) mode. Pixel resolution in 60cm in the oanchromatic band and 1m in the multispectral band.
The subsets presented on this page are fused synthetic bands. This means the higher spatial details of the panchromatic
band has been incroporated into the multispectral dataset to obtain a colour image with 60cm pixel resolution. Image fusion
is a common method to improve the spatial detail in remote sensing data. For this data set Principal Component Substitution
was applied.
What can be seen on the image subset?
On this small subset two cooling towers are regognizable. They belong to a local power plant, generating electricity from
coal. In this so called false colour composite image vegetation appears red. Other objects appear in their real colour. The
resolution of this image is so good that individual objects like cars, mining equippment and the like can be spotted. Therefore
time series of this kind of data are perfect for detecting changes of mining infrastructure, buildings, land subsidence phenomena
and further small scale changes not recognizable in other satellite data. Data of this scale furthermore allows to "have a
look" on regions, which are not accessible by man (too difficult terrain, restricted / secured areas, dangerous areas).
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