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# geojson-area

Calculate the area inside of any [GeoJSON](http://geojson.org/) geometry.

## usage

    npm install @mapbox/geojson-area

## example

```js
var geojsonArea = require('@mapbox/geojson-area');

var area = geojsonArea.geometry(obj);
```

## api

### `geojsonArea.geometry(obj)`

Given a Geometry object, return contained
area as square meters. Invalid input will return `null`.

Adapted from [OpenLayers](http://openlayers.org/)