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Spike

A spike map is proportional symbol map, which is a type of thematic map that uses map symbols (spikes in this example) that vary in size to represent a quantitative variable.1
Example below contains data about Covid cases in Czech Republic.

Example​

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Installation​

npm i geovisto-layer-spike

Configuration​

Configuration used in example above:

{
    "type": "geovisto-tool-layer-spike",
    "id": "geovisto-tool-layer-spike",
    "enabled": true,
    "layerName": "Spike layer",
    "data": {
        "latitude": "lat",
        "longitude": "long",
        "category": "data.category",
        "value": "data.value",
        "aggregation": "sum"
        "color": "#00FF00"
    }
}

Dimensions​

Dimensions used in Spike Layer:

  • latitude - latitude
  • longitude - longitude
  • category - main category to display
  • value - value of category to display
  • aggregation - value aggregation
  • color - color of spikes

1 Wikipedia: Proportional symbol map