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 markText markInteractivityTooltipsCircle 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
Legends
viz.legend
viz.legend.box()
viz.plot({ type: "leg_box" })
viz.legend.box({
rect_fill: "#38896F",
rect_width: 30,
rect_height: 30,
rect_strokeWidth: 2,
label: "Hello Geoviz",
label_fill: "#38896F",
label_fontSize: 20
})
viz.legend.box({
gap: 10,
rect_fill: "#38896F",
rect_width: 30,
rect_height: 30,
rect_strokeWidth: 2,
label: "Hello Geoviz",
label_fill: "#38896F",
label_fontSize: 13,
title: "Title",
title_textDecoration: "underline",
subtitle: "Subtitle",
note: "Made with geoviz",
note_fill: "#38896F"
})
viz.legend.box({
text_fill: "#38896F",
text_fontSize: 12,
rect_fill: "#38896F",
rect_width: 30,
rect_height: 30,
rect_strokeWidth: 2,
label: "Hello Geoviz",
label_fontSize: 13,
title: "Title",
subtitle: "Subtitle",
note: "Made with geoviz"
})
{
let svg = viz.create({ width: 800, domain: world });
svg.path({ datum: world, fill: "#38896F" });
svg.legend.box({
pos: [60, 220],
rect_fill: "#38896F",
rect_width: 30,
rect_height: 30,
label: "Hello Geoviz",
label_fontSize: 13,
title: "Title",
subtitle: "Subtitle",
note: "Made with geoviz",
frame: true,
frame_fill: "#38896F",
frame_fillOpacity: 0.2,
frame_margin: 10
});
return svg.render();
}
viz.legend.choro_horizontal()
viz.plot({ type: "leg_choro_horizontal" })
viz.legend.choro_vertical({})
choro = viz.tool.choro(
world.features.map((d) => d.properties.gdppc),
{ method: "q6", palette: "BluGrn", nb: 6 }
)
viz.legend.choro_horizontal({ breaks: choro.breaks, colors: choro.colors })
viz.legend.choro_horizontal({
title: "GDP per capita",
subtitle: "(in thousands)",
breaks: choro.breaks,
colors: choro.colors,
values_fill: "#38896F",
values_factor: 0.001, // to convert into thousands
values_round: 1,
rect_height: 20,
rect_spacing: 2,
missing: false
})
viz.legend.typo_horizontal()
viz.legend.typo_vertical()
typo = viz.tool.typo(
world.features.map((d) => d.properties.region),
{ palette: "Bold" }
)
viz.legend.typo_horizontal({ types: typo.types, colors: typo.colors })
viz.legend.typo_horizontal(typo)
viz.legend.typo_horizontal({
...typo,
title: "The 6 continents",
subtitle: "(Even if continents are a geographical nonsense...)",
rect_transform: "translate(0,20)",
alphabetical: false,
rect_width: 20,
rect_spacing: 30,
values_dy: -27
})
viz.legend.circles()
viz.legend.circles_nested()
viz.legend.circles_nested({
data: world.features.map((d) => d.properties.pop),
k: 40
})
radius = viz.tool.radius(
world.features.map((d) => d.properties.pop),
{ k: 50 }
)
viz.legend.circles_nested(radius)
viz.legend.circles_nested({
...radius,
nb: 6,
gap: 25,
title: "Population in inh.",
circle_fill: "#38896F",
circle_fillOpacity: 0.5,
circle_stroke: "white",
line_stroke: "#38896F",
line_width: 50,
line_length: 80,
values_dy: -5,
values_textAnchor: "end",
values_fill: "#38896F",
note: "Made with Geoviz",
note_dy: -15
})
viz.legend.spikes()
viz.legend.spikes({
data: world.features.map((d) => d.properties.pop / 1000000),
spike_stroke: "#38896F",
spike_width: 30,
spike_fill: "#38896F",
spike_fillOpacity: 0.3,
nb: 8,
k: 100,
spike_straight,
values_round: 0,
title: "Population",
subtitle: "(in million inh.)",
note: "Made with Geoviz"
})
viewof circle_cornerRadius = Inputs.range([0, 10], {
label: "circle_cornerRadius",
step: 1,
value: 5
})
viz.legend.circles_half({
title: "World population",
subtitle: "(in thousands inh.)",
data: world.features.map((d) => d.properties.pop / 1000),
circle_cornerRadius,
circle_fill: "#38896F",
circle_fillOpacity: 0.7
})
viz.legend.mushrooms({
title: "Population and Wealth",
// TOP
top_title: "Population",
top_data: world.features.map((d) => d.properties.pop / 1000000),
// BOTTOM
bottom_title: "GDP",
bottom_data: world.features.map((d) => d.properties.gdp / 1000000000)
})
viz.legend.squares({
data: world.features.map((d) => d.properties.pop),
values_factor: 1 / 1000000,
values_round: 0,
title: "Population",
subtitle: "(in million inh.)"
})
viz.legend.squares_nested({
data: world.features.map((d) => d.properties.pop),
values_factor: 1 / 1000000,
values_round: 0,
title: "Population",
subtitle: "(in million inh.)"
})
viz.legend.symbol_horizontal()
viz.legend.symbol_vertical()
viz.tool.symbols()
viz.legend.symbol_horizontal({
title: "A legend with symbols",
subtitle: "subtitle",
note: "source",
types: ["pin", "hospital", "flower", "cloud", "human", "tent"],
symbols: ["pin", "hospital", "flower", "cloud", "human", "tent"],
symbol_fill: "#38896F",
symbol_stroke: "none"
})
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