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Maps

Map Points

type: 'mappoint'

Point markers placed at geographic lat/lon coordinates on top of a basemap. Markers, data labels, tooltips, hover and click all project through the same mapView as the basemap.

Edit the JSON on the right and press Run (or ⌘/Ctrl + Enter) — data, titles, categories and colors all update live.

Live
Map Points
Edit · JSON

Data format

{ id: string, lat: number, lon: number, color? }

Data shape

The JSON you pass inside the chart — drop it straight into your series.

data: [
  { id: 'New York', lat: 40.71, lon: -74.0 },
  { id: 'London', lat: 51.5, lon: -0.12 },
  { id: 'Tokyo', lat: 35.68, lon: 139.69 }
]

Example

import KatuCharts from 'katucharts.js';

KatuCharts.chart('container', {
  chart: { type: 'map' },
  chart: { type: 'map', map: world },
  series: [
    { type: 'map', mapData: world, data: [] },
    {
      type: 'mappoint',
      dataLabels: { enabled: true, format: '{point.id}' },
      data: [
        { id: 'New York', lat: 40.71, lon: -74.0 },
        { id: 'London', lat: 51.5, lon: -0.12 }
      ]
    }
  ]
});

Type-specific options

OptionDescription
lat / lonGeographic coordinates of each marker.
marker{ radius, lineColor, lineWidth, enabled }.
dataLabelsPer-point labels, e.g. format: '{point.id}'.
colorSeries or per-point marker color.

Common errors

Why does my map points chart render as a line chart?
The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?
The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?
The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

FAQ

How do I create a map points chart in JavaScript?
Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'mappoint' }, series: [...] }).
Why does my map points chart render as a line chart?
The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?
The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?
The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.
Common options (color, visible, marker, dataLabels, animation, events, zones…) apply to every type — see Configuration → series. See it rendered in the gallery.