covutils/README.md

Utilities for creating, transforming, and handling Coverage Data objects.

# covutils

JavaScript utilities for creating, transforming, and handling [Coverage Data objects](https://github.com/Reading-eScience-Centre/coverage-jsapi).

[API docs](https://doc.esdoc.org/github.com/Reading-eScience-Centre/covutils/)

## Usage

A minified bundle of this library is available on [npmcdn](https://npmcdn.com/covutils/).

Usage is simple:
```html
<script src="https://npmcdn.com/covutils@0.6/covutils.min.js"></script>
<script>
var coverage = ... ;

// let's mask the Coverage with a GeoJSON polygon
// any data values outside the polygon become null
var polygon = {
  "type": "Polygon",
  "coordinates": [
    [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]
    ]
}
CovUtils.maskByPolygon(coverage, polygon, ['x','y'])
  .then(function (maskedCov) {
    // work with masked Coverage
  })
</script>
```

If polygon-related functionality is not needed, then a lite bundle can be used instead:
```html
<script src="https://npmcdn.com/covutils@0.6/covutils-lite.min.js"></script>
```

### CommonJS/JSPM/ES6

You may also use this library within common package managers as it is published on npm.

An ES6 import may look like that:

```js
import {maskByPolygon} from 'covutils'
```

## Acknowledgments

This library is developed within the [MELODIES project](http://www.melodiesproject.eu).