softwarepraktikum2020 - Divining Rod

Our Program is analyzing radarpictures of the Sentinel-1 satellite from the Copernicus-Project of ESA. It calculates the area of a coherent waterbody and is supposed to compare seasonal deviations of waterlevels and long-/middle term tendencies of shrinking or growing.

Technology:

• The SENTINEL-1 Toolbox (s1tbx)
• Java, Maven

Input:

• SciHub Credentials
• ingestion timeframe
• origin x-y-coordinate in WGS 84 Referencesystem

Workflow:

1. Downloads namend data fromm ESA's Copernicus Open Access Hub and loads it into the program
2. Detects watersurfaces in radarpictures after colour-smoothing and recolouring into a black/white scheme
3. Finds and counts all pixels within the coherent waterbody through a scanline-algorithm. Returns number of pixels.
4. One pixel has the area of 100m^2. Calculates the area of the waterbody.

How our scanline version works:

• GIF Sample shows Labussee (lake in the Mecklenburgische Seenplatte district in Mecklenburg-Vorpommern, Germany. At an elevation of 57.5 metres (189 ft), its surface area is 2.51 square kilometres (0.97 sq mi)).

Software architecture

Consult our UML-Diagram

Output:

• an Integer that represents the approximate area (in squaremeters) of water-sureface
• and the choosen smippet of sentinel-1 radar image

• Outputs are colored grey or blue and have been altered with a median-filter, a gauss-filter or non at all.

Projectteam:

• Alexander Pilz @xcomagent95
• Josefina Balzer @jbalzer12
• Gustav Freiherr von Arnim @OTI2020

joined for one week:

• Dorian Hennigfeld @dhenn12
• Ole Heiland @heilandoo

Author of Readme:

• Gustav Freiherr von Arnim @OTI2020