Hi. I'm Nicolas Lambert, research engineer in geographic information science at CNRS (France). My job is to draw maps and teach cartography at the university. I am a geographer 🌎, and not really a developer 🖥️
Map projectionsh3-jsSymbolsThe draw() functionsquareProportional symbolsSpike markTypologyChoroplethLayout marksHandle geometriesSVG filters and clipTile markContainersinsetsPath markInteractivityTooltipsLegendsCircle markRidgelines mapWhy it's better not to add scalebars to world mapsNight and dayPan and zoomCharging points for electric vehicles in ParisLet's design a "dot cartogram"Hello geovizWorld Population
Text mark
viz.text({
fill: "#38896F",
text: "cogito ergo sum",
fontSize: 20,
textDecoration: "underline",
letterSpacing: 10,
wordSpacing: 30
})
viz.text({
fill: "#38896F",
text: "Ideas are the source\nof all things (Platon)",
fontSize: 20,
fontStyle: "italic",
lineSpacing: 10
})
{
// Container
let svg = viz.create({
width: 500,
zoomable: true,
domain: world
});
// Basemap
svg.path({ datum: world, fill: "#CCC" });
// Text
svg.text({
pos: [200, 50],
text: "Hello geoviz",
fontSize: 30,
fill: "#38896F"
});
// Render
return svg.render();
}
abuja = [7.396, 9.076]
{
// Container
let svg = viz.create({
width: 500,
zoomable: true,
domain: world
});
// Basemap
svg.path({ datum: world, fill: "#CCC" });
// Text
svg.text({
pos: abuja,
coords: "geo",
text: "Abuja",
fontSize: 30,
fill: "#38896F"
});
// Render
return svg.render();
}
viz.text({ data: world, text: "ISO3", fill: "#38896F", svg_zoomable: true })
{
// Container
let svg = viz.create({
width: 500,
zoomable: true,
domain: world
});
// Basemap
svg.path({ datum: world, fill: "#CCC" });
// Here we create points at the centroid of the countries in the map coordinates.
const centroids_latlon = viz.tool.centroid(world);
const centroids_xy = viz.tool.project(centroids_latlon, {
projection: svg.projection
});
// Text
svg.text({
coords: "svg",
data: centroids_xy,
text: "ISO3",
fill: "#38896F"
});
// Render
return svg.render();
}
font = viz.tool.addfonts([
{
fontFamily: "Orbitron",
url: await FileAttachment("Orbitron-VariableFont_wght.ttf").url()
}
])
{
// Container
let svg = viz.create({
width: 500,
zoomable: true,
domain: world
});
// Basemap
svg.path({ datum: world, fill: "#CCC" });
// Only countries with more than 100 million inh.
const bigcountries = viz.tool.featurecollection(
world.features.filter((d) => d.properties.pop >= 100000000)
);
// Text
svg.text({
data: bigcountries,
text: "name",
fontSize: 20,
fontFamily: "Orbitron",
fill: "#38896F"
});
// Render
return svg.render();
}
{
// Container
let svg = viz.create({
width: 500,
domain: world
});
// Basemap
svg.path({ datum: world, fill: "#CCC" });
// Position marker
const pos = [250, 120];
svg
.append("circle")
.attr("cx", pos[0])
.attr("cy", pos[1])
.attr("r", 5)
.attr("fill", "#616161")
.attr("stroke", "none");
// Text
svg.text({
pos: pos,
text: `"In that Empire, the Art of Cartography
attained such Perfection that the map
of a single Province occupied the entirety
of a City, and the map of the Empire, the
entirety of a Province"
(Jorge Luis Borges)`,
fontSize: 13,
fill: "#38896F",
dominantBaseline: dominantBaseline,
textAnchor: textAnchor,
dx: dx,
dy: dy
});
// Render
return svg.render();
}
import { style, world, disclaimer, viz } from "@neocartocnrs/geoviz-appendix"
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