npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

ol-magic-wand

v1.0.5

Published

Magic Wand (selection tool by color differences) for Openlayers library

Downloads

349

Readme

view on npm License: MIT

Magic Wand (selection tool by color differences) for OpenLayers library

Creates a binary mask and contours (vector data) from the specified layers of the map

Installation

Install it thought NPM:

npm install ol-magic-wand

Usage


import "ol/ol.css";

import { Map, View } from "ol";
import { Tile as TileLayer } from "ol/layer";
import { OSM } from "ol/source";
import { defaults as defaultInteractions } from "ol/interaction";
import MagicWand from "ol-magic-wand";

let osm = new TileLayer({
  source: new OSM()
});

let wand = new MagicWand({ 
  layers: osm
});

const map = new Map({
  target: "map",
  interactions: defaultInteractions().extend([wand]),
  layers: [osm],
  view: new View({
    center: [0, 0],
    zoom: 1
  })
});


// set map layer or layers to create snapshot and to draw a mask
wand.setLayers([/* some other layers */]);

// get sequential arrays of points (contours) by the binary mask
let contours = wand.getContours();

// get a data of the current mask: 1-D binary array and top-left corner
let mask = wand.getMask();

// clear the current mask and remove it from the map view
wand.clearMask();

Example usage:

Live example

License

MIT (c) 2019, Ryasnoy Paul