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Edited
Aug 22, 2023
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Streaming Shapefiles
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Maps
{
const context = DOM.context2d(width, height);
yield context.canvas;
const path = d3.geoPath(projection, context);
const source = await shapefile.open(await FileAttachment("UScounties.shp").stream(), null);
while (true) {
const result = await source.read();
if (result.done) break;
context.beginPath(), path(result.value), context.stroke();
}
}
projection = d3.geoAlbersUsa()
.scale(1272)
.translate([width / 2, height / 2])
width = 954
height = 600
d3 = require("d3-geo@1")
shapefile = require("shapefile@0.6")
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.
