geojson-offset-ts


Add coordinate offest to the GeoJSON.
This fork is rewritten in typescript.

Installation

``bash
npm install geojson-offset-ts
`

`bash
yarn add geojson-offset-ts
`

Usage

Noted this function will UPDATE the input geojson. If there is a need to return a copy of original geojson, please let me know by openning an issue.

geojson-offset-ts supports all GeoJSON types:

- FeatureCollection
- Feature
- Geometery
- Point
- MultiPoint
- LineString
- MultiLineString
- Polygon
- MultiPolygon

But TopoJSON does not supported. Please convert to geojson by topojson.feature before use.

`javascript
import { offset } from 'geojson-offset';
import { randomOffset } from 'geojson-offset';

let geojson = {
type: 'FeatureCollection',
features: [
{
type: 'Feature',
geometry: {
type: 'Point',
coordinates: [-78, 48],
},
properties: {},
},
],
};

/**
* Pass the geojson and the x/y coordinate offset
*/
gejson = offset(geojson, -1, 1);

/**
* Pass the geojson and x/y coordinate offset range. The same offset will be
* applied to all features in the input GeoJSON.
*/
geojson = randomOffset(geojson, [0, 10], [-10, 10]);
``