base map-simple / Wenji Pu

Public

Edited

Dec 18, 2023

# base map-simple

d3 = require("d3@6")

chart = {

const width = 900,

height = 910;

const svg = d3.create("svg")

.attr("viewBox", [50, 50, width-100, height-100]);

// Use Mercator projection

var projection = d3

.geoMercator()

.fitSize([width - 50, height - 50], bbox);

var path1 = d3.geoPath().projection(projection);

var path2 = d3.geoPath().projection(projection);

var path3 = d3.geoPath().projection(projection);

var g = svg.append("g").attr("id", "paths");

g.selectAll("path3") //d3 geopath

.data(wards.features) //get data to define path

.enter() //there are more data than elements, this selects them

.append("path") //appends path to data

.attr('class','outlines')

.attr("d", path3) //The d attribute defines a path to be drawn, only applies to appended elements

.style("fill", 'none')

.style('stroke-opacity','.4')

.style("stroke-width", '.5')

.style("stroke", "rgb(0,0,0)")

return svg.node();

}

commercial = FileAttachment("commercial.geojson").json()

stations = FileAttachment("stations.geojson").json()

railway = FileAttachment("railway@1.geojson").json()

restaurant1 = FileAttachment("kura sushi.geojson").json()

restaurant2 = FileAttachment("sushiro.geojson").json()

wards = FileAttachment("Tokyo Wards.geojson").json()

bbox = FileAttachment("new bounding.geojson").json()

tour = FileAttachment("tour spots.geojson").json()

density1 = FileAttachment("density1.txt").tsv({array:true})

density2 = FileAttachment("density2.txt").tsv({array:true})

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.

Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.

Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.