Geovisto Choropleth Layer Tool

Extension of the Geovisto core library which provides the tile layer.

This repository is a snapshot of Geoviosto tools/layers/choropleth derived from the development repository: geovisto/geovisto-map.

Usage

import { GeovistoChoroplethLayerTool } from 'geovisto-layer-choropleth';
import 'geovisto-layer-choropleth/dist/index.css';

// create instance of map with given props
const map = Geovisto.createMap({
  // ...
  tools?: Geovisto.createMapToolsManager([
    // instances of Geovisto tools (extensions) which will be directly used in the map
    // ...
    GeovistoChoroplethLayerTool.createTool({
      id: "geovisto-tool-layer-choropleth"
      dimensions?: ...; // provide instance of IChoroplethLayerToolDimensions to override dimensions
      geoData?: ...; // provide instance of IGeoDataManager to override geographical data manager
    }),
  ])
});

// rendering of the map
map.draw(Geovisto.getMapConfigManagerFactory().default({
  // initial settings of the map can be overriden by the map config - JSON structure providing user settings 
  // ...
  tools?: [
    // config of Geovisto tools (extensions) used in the map
    {
      "type": "geovisto-tool-layer-choropleth",
      "id": "geovisto-tool-layer-choropleth",
      "enabled": true,
      "name": "Choropleth layer",
      // mapping of data domains to data dimensions
      "data": {
        "geoData": "world polygons", // geo data id
        "geoId": "country", // domain name
        "value": "value", // domain name
        "aggregation": "sum", // [ "sum", "count" ]
        "customColor": true,
        "color": "#e32400",
        "range": 7, // 1..7
        "scaling": "median", // [ "median", "relative [0-max]", "relative [min-max]", "decimal [0-max]" ]
        "units": "$", // units shortcut
        "unitsDesc": "US Dollars", // units label
        "round": 1 // rounding
      }
    },
  ]
}));

Installation

npm install --save geovisto-layer-choropleth

Peer dependencies:

npm install --save geovisto leaflet

This package serves as an extension of Geovisto core using the API for Geovisto tools (extensions). Follow Geovisto core on Github.

License

MIT