d3-node/choropleth-us-states

Name: choropleth-us-states

Owner: D3-Node

Description: null

Created: 2017-08-20 10:51:10.0

Updated: 2017-08-20 10:53:51.0

Pushed: 2017-08-25 05:42:09.0

Homepage: null

Size: 377

Language: JavaScript

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README

Choropleth Map of US States :earth_americas:

Choropleth of US States via data and defined color scale

Install

m install @d3-node/choropleth-us-states --save

Usage

t d3nMap = require('@d3-node/choropleth-us-states')

ead CSV -> parse to json
t csv = fs.readFileSync('./StatePopulations.csv').toString()
t data = d3nMap.csvParse(csv)

t stateNameField = 'State' // optional, default = 1st column
t metricField = 'Population' // optional, default = 2nd column
t colors = [ // 9-color scheme (blue)
f7fbff', '#deebf7', '#c6dbef',
9ecae1', '#6baed6', '#4292c6',
2171b5', '#08519c', '#08306b'

t scale = [ // color buckets for state populations
 600000, 800000, 1500000, 2500000, 5000000, 9000000, 20000000, 400000000


t map = d3nMap({ data, colors, scale, stateNameField, metricField })
svgString() // returns <svg>

See test for actual usage.

Output the test map to an image (PNG)

test

API

Options

{ data, colors, scale, [ stateNameField, metricField ] }