Filters and Popups¶

Filters and popups are the map's first explanation layer. They should help you understand what you are seeing without making the atlas look simpler or stronger than it really is.

That matters because the map changes by scope. World, Europe-plus, Nordic, and country views do not all show the same layers, and a popup is not allowed to quietly inflate a thin record into a confident story.

What You Should Learn Quickly¶

which countries are active in one scope
which point layers remain visible after geography filtering
why Nordic-only context overlays disappear when you move back to world or Europe-plus
whether animal points belong to the world surface only or to narrower derived views
whether a country bundle is derived from the world surface directly or through a regional parent

The point of these surfaces is not decoration. It is to keep geography selection auditable even if you did not build the site.

What Filters Are For¶

show which geography and layer choices are active
keep scope changes visible instead of making them feel like a hidden frontend preference
stop a world, regional, and country map from pretending to be the same view with different zoom levels

What Popups Are For¶

tell you what kind of point or layer you are looking at
expose the compact facts needed for orientation without replacing the deeper evidence page
point toward the next narrower audit when the visible summary is not enough

What These Surfaces Must Not Do¶

hide why a point appears in one scope and not another
make contextual layers read like sample-backed proof
make a broad-area or weakly located record sound precise
let frontend convenience outrun publication rules

Leave the popup and move to a narrower page when:

a visible point looks more precise than expected
one layer disappears between scopes and the change matters
you need chronology, locality, or provenance rather than a compact label
the public wording sounds stronger than the evidence probably allows

Follow-Up Pages¶

use maps for the wider scope picture
use point rules for why a point can publish at all
use map inputs for the files behind the visible result
use limits when the honest answer may be blockage or weakness

Nordic Atlas Filters And Popups¶

The Nordic atlas inherits these filtering rules from the wider publication geography contract. Its popups should explain visibility and caveat posture, not hide selection logic behind front-end convenience.