world.features.find(o => o.properties.name.match("Serbia"))
areas = world.features
// select only countries in europe
.filter(o => o.properties.continent == "Europe"
|| o.properties.name == "Morocco"
|| o.properties.name == "Algeria"
|| o.properties.name == "Tunisia"
|| o.properties.name == "Turkey"
|| o.properties.name == "Greenland"
)
// flatten multipolygons into polygons
.reduce((countries2, feature) => {
if (feature.geometry.type == "Polygon") {
countries2.push(feature);
} else { // MultiPolygon
feature.geometry.coordinates.forEach(coordinates => {
countries2.push({
type: "Feature",
properties: feature.properties,
geometry: { type: "Polygon", coordinates },
});
});
}
return countries2;
}, [])
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
