Generating a USA map with DataMaps in d3jsonData

I'm trying to create a basic US map using the DataMaps package and d3 library. Here's what I have attempted so far:

<!DOCTYPE html>
<html>
<head>
<title> TEST </title>

<script src="https://d3js.org/d3.v5.js"></script>
<script src="https://unpkg.com/topojson@3"></script>
<script src="node_modules/datamaps/dist/datamaps.world.min.js"></script>

<div id="container" style="position: relative; width: 500px; height: 300px;"></div>

<script>

  var map = new Datamap({
    element: document.getElementById('container'),
    scope: 'usa'
  })

  var projection = d3.geoAlbers()

</script>

It seems like there may be an issue with the links above (even though I've installed DataMaps with NPM). It appears that I'm not using the correct version of d3 or something along those lines.

Currently, I'm encountering this error:

Uncaught TypeError: Cannot read property 'albersUsa' of undefined

I managed to resolve the above error by following the solution provided in this question: albersUsa fix

When I switch from using scope: 'usa' to scope: 'world', I face a similar error, but this time it mentions equirectangular instead of albersUsa.

Could someone guide me on how to successfully display this map? Thank you

javascriptd3.js

Answer №1

After examining the code, it appears that Andrew Reid is correct in pointing out a potential D3 version compatibility issue. While I am not very familiar with this library, I was able to successfully create a simple choropleth map using an example with D3 version 3:

<!DOCTYPE html>
<html>
<head>
<title> TEST </title>

<script src="https://d3js.org/d3.v3.js"></script>
<script src="https://unpkg.com/topojson@3"></script>
<script src="node_modules/datamaps/dist/datamaps.world.min.js"></script>

<div id="container" style="position: relative; width: 500px; height: 300px;"></div>

<script>

  var map = new Datamap({
        element: document.getElementById('container'),
        fills: {
            HIGH: '#afafaf',
            LOW: '#123456',
            MEDIUM: 'blue',
            UNKNOWN: 'rgb(0,0,0)',
            defaultFill: 'green'
        },
        data: {
            IRL: {
                fillKey: 'LOW',
                numberOfThings: 2002
            },
            USA: {
                fillKey: 'MEDIUM',
                numberOfThings: 10381
            }
        }
    });


</script>

Despite replicating your adjustments in my own code, I encountered difficulties in getting the example to function properly. This indicates there may be underlying issues within the code snippet you provided.

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