Maps · World: choropleths and the world's countries

ChoroplethLayer washes each area by its value, keyed by its id or a
property's text or number, on one hue's scale from its faintest at the
least value to its strongest at the most; an area without a value reads
as no data. ChoroplethMap lays it on the owner's map, with or without
tiles, and puts a legend of the scale and of no data in the corner; a
value that matches no area is logged once. WorldMap washes Natural
Earth's 110m countries, bundled trimmed by scripts/countries.py, by ISO
3166 alpha-2 code, and fails on a key that is no code. A shape now
paints as one fill and one edge path per world in view.

examples/gallery/pages/dashboard/monitor.rs

@@ -214,7 +214,7 @@ pub fn stream(_: &mut Window, cx: &mut App) -> impl IntoElement + use<> {
         ),
     ];
     section(
-        "EventStream · LogStream → terminal::LogViewer · TraceWaterfall → debug::TimelineProfiler · SystemMonitor → devtools::ResourceMonitor · ProcessTable → terminal::ProcessList · NetworkGraph (throughput) → charts::RealtimeChart · MapView / GeoHeatmap → maps::MapView, maps::GeoHeatmap · WorldMap → maps (T41c)",
+        "EventStream · LogStream → terminal::LogViewer · TraceWaterfall → debug::TimelineProfiler · SystemMonitor → devtools::ResourceMonitor · ProcessTable → terminal::ProcessList · NetworkGraph (throughput) → charts::RealtimeChart · MapView / GeoHeatmap → maps::MapView, maps::GeoHeatmap · WorldMap → maps::WorldMap",
         "Events as they come, newest first, kept by kind, with Pause to hold the list while new ones count up. Logs, traces, a machine's readings, its processes and live throughput have their homes in the terminal, agent, dev tools and charts chapters; the maps live in the maps chapter.",
         cx,
     )