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.
MapView takes layers over its tiles and under its pins. RouteLine runs
along places the short way across the date line. read_geojson reads RFC
7946 to features, strictly: a position past the globe, a line of one
position or a ring that does not close fails with its reason, and a
feature placed nowhere keeps no geometry. GeoJsonLayer washes areas as
one path per polygon, so holes stay open, outlines them, strokes lines
and dots points. GeoHeatmap spreads weighted places in a quartic kernel
over small cells, scaled to the densest spot in view. Lines and areas
unwrap across the date line and repeat on every world in view.
cluster_markers gathers pins by squares of the world, so a pan keeps
each group; a cluster shows its count, and its press shows its members
whole, never farther out. A zoom that may regroup them hands a focused
pin's or cluster's focus to the map.
maps::MapView lays the host's tile for each zoom, column and row in Web
Mercator, the nearest cut scaled past the zooms it serves, on whole
pixels. gpui packs pictures in its atlas without padding and samples
them linearly, so each tile draws with a one-pixel rim copied from its
own edge, one of its pixels larger each side and clipped, and no seam
shows. A drag, the wheel or the arrows pan; Command-wheel, + and - or
its buttons zoom about the pointer or the center; the owner keeps the
viewport. MapMarker pins take a press and Enter when the map hears
them; MapPopup opens toward the map's larger half and stays inside it,
closing by its button or Escape. LocationPicker picks the place under a
center crosshair; CoordinateDisplay writes degrees or degrees, minutes
and seconds with tabular figures and a copy button. The gallery's tiles
are Natural Earth's countries, cut z0 to z3 by scripts/tiles.py.
ZacharyZhang-NY