demo D258

Hex map in React

Snap places to a tidy hex grid so a small region reads as clearly as a large one

type: 'hexmap', lon, lat

This snaps places onto a tidy hex grid so a small region reads as clearly as a large one. It gives every area equal visual weight, so a pattern is not dominated by the physical size of the places on the map.

Building…

Loading a live grid…

This is the React version. The grid mounts through the createLatticeGrid adapter, which takes its configuration as ordinary props and hands back the live grid through a ref. The grid below is the same one every other tab runs.

The configuration

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.71.0/lattice-grid.min.css">

<div id="app"></div>

<script type="module">
  import React from 'https://esm.sh/react@18';
  import { createRoot } from 'https://esm.sh/react-dom@18/client';
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.71.0/lattice-grid.esm.min.js';
  import { createLatticeReact } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.71.0/modules/react.esm.min.js';
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.71.0/modules/charts.esm.min.js';
  import 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.71.0/modules/chart-hexmap.esm.min.js';  // opt in to the hexmap type

  const { LatticeGrid, LatticeChart } = createLatticeReact({ React, createGrid, createChart });

  const columns = [
      { field: 'city', title: 'City' },
      { field: 'lon', title: 'Longitude', type: 'number', format: { decimals: 2 } },
      { field: 'lat', title: 'Latitude', type: 'number', format: { decimals: 2 } },
      { field: 'users', title: 'Users (m)', type: 'number', format: { decimals: 1 }, total: 'sum' },
  ];

  const rows = [/* one city a row: city, lon, lat, users */];

  function App() {
    const [grid, setGrid] = React.useState(null);

    return (
      <>
        {grid && (
          <LatticeChart grid={grid} type="hexmap" lon="lon" lat="lat" title="Cities on a hex grid" style={{ height: '340px' }} />
        )}
        <LatticeGrid
          rowKey="id"
          columns={columns}
          rows={rows}
          onGridReady={setGrid}
          style={{ height: '320px', marginTop: '14px' }}
        />
      </>
    );
  }

  createRoot(document.getElementById('app')).render(<App />);
</script>