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Choropleth

A choropleth map is a type of statistical thematic map that uses intensity of color to correspond with an aggregate summary of a geographic characteristic within spatial enumeration units, such as population density.1
Example below contains data about Gross domestic product2 in countries that are members of OECD3.

Example​

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Installation​

npm i geovisto-layer-choropleth

Configuration​

Configuration used in example above:

{
    "type": "geovisto-tool-layer-choropleth",
    "id": "geovisto-tool-layer-choropleth",
    "enabled": true,
    "layerName": "Choropleth layer",
    "data": {
        "geoData": "world polygons",
        "geoId": "Country",
        "value": "Value",
        "aggregation": "sum",
        "scaling": "median",
        "range": 7,
        "customColor": true,
        "color": "#041FEC",
        "unitsEnabled": true,
        "units": "$",
        "unitsDesc": "US Dollars (Millions)"
    }
}

Dimensions​

Dimensions used in Connection Layer:

  • geoData - polygons/centroids
  • geoId - geospatial data
  • value - value to be displayed
  • aggregation - aggregation
  • scaling - scaling method
  • range - number of shades of color to use
  • customColor - custom color enabled/disabled
  • color - custom color
  • unitsEnabled - enable/disable units
  • units - short units
  • unitsDesc - longer units

1 Wikipedia: Choropleth map
2 Wikipedia: Gross domestic product
3 OECD