Filter a layer using a dynamic relative-value

Question

In a map I’m using a dynamic layer (WFS) which updates daily, containing rain gauge data.

I would like to filter the layer (using the rain amount numeric filed) in order to show only the highest precipitation value feature. When I try to filter the layer using the numeric field I just find only absolute filter expressions:

which apply to a particular value.

Is there a workaround to filter by the greatest value (like Relative-date filters do)?

Roberto

KimOllivier · Answer

The only way I have done this is by using the Python API and Pandas to find the maximum value and then update a field

RobertoRossi · Answer

:@KimOllivier , you are right, Arcade is not available in map filters: that's way  I was wondering there could be a workaround via styles or labelling...

KimOllivier · Answer

"Not all Arcade functions are suitable for every profile. For example, profiles that execute expressions for all features in a layer (e.g. visualization and labeling) don't allow expressions to access data via FeatureSet functions."

I don't think you are allowed to use Arcade in a map filter because of the overhead implied. You will have to process the highest value earlier before the data is in a MapView.