New variables: estimated_forest_class etc.

[Andrzej Odrzywolek]

I've noticed new data in brouter-web Data tab. In addition to estimated_traffic_class we have:

estimated_forest_class

estimated_noise_class

estimated_town_class

estimated_river_class

How is this supposed to work? For example, is estimated_forest_class related to ,,tree density'' or something like this? Could it be used, e.g., for upwind routing?

Andrzej O. 

[Robin Bourgeon]

I was asking myself the same question this morning and this is quite technical. If you go here on github you will notice in this commit from 2023-07-06 that the file misc/scripts/mapcreation/brouter.sql had significant changes. And in these changes, we see new stuff that allows to compute forest_class, river_class and so on.

This file allows us to understand how these (and the estimated_traffic_class that is much older) are computed: in fact, the distance of each way to any industrial area/tertiary area/populated area/"green area"/river and so on is used to estimate these factors.

[Paweł Stankiewicz]

I tried to analyse the code I wrote my notes as https://github.com/abrensch/brouter/blob/master/docs/developers/environmental_considerations_and_pseudo_tags.md

[Olivia Throne]

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