This is a digital terrain model. ( #dgm #digitalesgeländemodell )
the brighter the colour, the higher the area.
Matter of fact, the deepest area there is at 0.00m above general height in the heights system of germany . Deutsches Haupt Höhen Netz ( #dhhn-2016nh )
The property is close to the "Elbe" .
the small buildings are Greenhouses.

and the picture shows a cross section and profile of a certain line.

#surveying