kv-wkt v1.0.0

wkt

This package lets you:

• Parse WKT (Well-known text) into GeoJSON
• Stringify GeoJSON into WKT

Install

npm install kv-wkt

Usage

Parse

Turn Well-known text string into GeoJSON

const { parse } = require('kv-wkt');

//  See return values in output section
const point_wkt = "POINT (30 10)";
const point_z_wkt = "POINT Z (30 10 10)";
const linestring_wkt = "LINESTRING (30 10, 10 30, 40 40)";
const polygon_wkt = "POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))";
parse(point_wkt);
parse(point_z_wkt);
parse(linestring_wkt);
parse(polygon_wkt);

Output from parse()

{ type: 'Point', coordinates: [30, 10] }
{ type: 'Point', coordinates: [30, 10, 10] }
{ type: 'LineString', coordinates: [ [ 30, 10 ], [ 10, 30 ], [ 40, 40 ] ] }
{ type: 'Polygon', coordinates: [[[30,10], [40,40], [20,40], [10,20], [30,10]]] }

Stringify

Turn GeoJSON geometry object or Feature object into WKT (Well-known text)

const { stringify } = require('kv-wkt');

const geometry = {
  type: "Point",
  coordinates: [30, 10, 10]
};
const geometry2 = { 
  type: "LineString",
  coordinates: [ [ 30, 10 ], [ 10, 30 ], [ 40, 40 ] ] 
};

//  See return values in output section
stringify(geometry);
stringify(geometry2);

Output from stringify()

"POINT Z (30 10 10)"
"LINESTRING (30 10, 10 30, 40 40)"