Calculation of "Wassermenge der letzten 30 Tage" is incorrect.

[meisteredermeistereder-the-second]

Background: Why this issue?

Represenation of "Wassermenge der letzten 30 Tage" is misleading. In the graph (and in the summed watering volume) it appears that

• the rainfall/m2, i.e. volume per square metre
• the absolute watering quantity, i.e. only a volume

are added. However, this is mathematically/physically incorrect and misleading, because the addition would only be possible if the tree bed had an area of 1 square metre. However, this should apply in the rarest of cases. Unfortunately, the illustration may suggest that the tree has already been watered enough, even though this may not be the case.

Deliverables: How to fix the issue?

Sorry, I have no good idea how to solve this issue. Only workaround I could imagine would be to include some sort of data sheet for the tree bed which the user fills in. This would have to include the size of the tree bed. However, this would also mean only a rough approximation, even if the measurement by the user would be correct.

Output: Gain of fixing the issue?

No misleading "satisfaction" even if the tree needs more water.

[joergreichert]

In https://dashboard.codeforleipzig.de/d/leipzig-giesst-public/leipziggiesstpublic?orgId=3 we have now a view for the rain and the possibility to adjust this

Maybe we should add this as well to the diagram view in LeipzigGiesst