Cities for People: Can I calculate the space covered by objects?

Hi,
Is it possible to calculate the space needed by a city like Brunswick?

In other words, can I calculate the space covered by a(n) area, node relation or way?

If the answer is yes:

The following Overpass query replies with about 3 thousand point of interest (POI’s) consisting if nodes, relations and ways regarding parking amenities.

[out:json][timeout:60];
relation(62531);
map_to_area;
(
nwr[amenity=parking](area);
);
out body center qt;

Can I calculate the space required by this queries reply?

At the end of the day I am aiming for the proportion of space for people vs. cars in areas like cities.

Cheers!

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Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/cities-for-people-can-i-calculate-the-space-covered-by-objects/105337