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

leaflet-rastercoords

v1.0.6

Published

Leaflet plugin for plain image map projection to display large images using tiles generated with gdal2tiles-leaflet

Downloads

2,643

Readme

leaflet-rastercoords

Leaflet plugin for plain image map projection to display large images using tiles generated with gdal2tiles-leaflet

NPM version

See the plugin in action on https://commenthol.github.io/leaflet-rastercoords/.

Usage

Process your "large" image with gdal2tiles-leaflet

// for use with browserify / webpack
var L = require('leaflet')
L.RasterCoords = require('leaflet-rastercoords')

var img = [
  3831,  // original width of image (here from `example/karta.jpg`)
  3101   // original height of image
]
// create the map
var map = L.map('map', {
  crs: L.CRS.Simple
})

// assign map and image dimensions
var rc = new L.RasterCoords(map, img)
// set max zoom Level (might be `x` if gdal2tiles was called with `-z 0-x` option)
map.setMaxZoom(rc.zoomLevel())
// all coordinates need to be unprojected using the `unproject` method
// set the view in the lower right edge of the image
map.setView(rc.unproject([img[0], img[1]]), 2)

// set markers on click events in the map
map.on('click', function (event) {
  // any position in leaflet needs to be projected to obtain the image coordinates
  var coords = rc.project(event.latlng)
  var marker = L.marker(rc.unproject(coords))
    .addTo(map)
  marker.bindPopup('[' + Math.floor(coords.x) + ',' + Math.floor(coords.y) + ']')
    .openPopup()
})

// the tile layer containing the image generated with `gdal2tiles --leaflet -p raster -w none <img> tiles`
L.tileLayer('./tiles/{z}/{x}/{y}.png', {
  noWrap: true,
  bounds: rc.getMaxBounds(),
  maxNativeZoom: rc.zoomLevel()
}).addTo(map)

Example

The tiles in the example were generated using gdal2tiles-leaflet. Take a look at example/createtiles.sh.

License

Copyright (c) 2016- commenthol (MIT License)
See LICENSE for more info.

References