geojson-offset v0.1.0

geojson-offset

Add coordinate offest to the GeoJSON

Installation

npm install geojson-offset

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 supports all GeoJSON types:

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

const offset = require('geojson-offset').offset;
const randomOffset = require('geojson-offset').randomOffset;

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]);