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leaflet-ruler

v1.0.0

Published

A simple leaflet plugin to measure true bearing and distance between clicked points.

Downloads

3,490

Readme

Leaflet-Ruler Plugin

A simple leaflet plugin to measure true bearing and distance between clicked points. Extends L.Control.

Demo

Demo

Requirements

  • Leaflet 1.0.0+

Usage

  • Create a leaflet map
  • Include leaflet-ruler.js and leaflet-ruler.css files.
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/gokertanrisever/leaflet-ruler@master/src/leaflet-ruler.css" integrity="sha384-P9DABSdtEY/XDbEInD3q+PlL+BjqPCXGcF8EkhtKSfSTr/dS5PBKa9+/PMkW2xsY" crossorigin="anonymous">  
<script src="https://cdn.jsdelivr.net/gh/gokertanrisever/leaflet-ruler@master/src/leaflet-ruler.js" integrity="sha384-N2S8y7hRzXUPiepaSiUvBH1ZZ7Tc/ZfchhbPdvOE5v3aBBCIepq9l+dBJPFdo1ZJ" crossorigin="anonymous"></script>
  • Add Ruler control to map
L.control.ruler().addTo(map);
  • Escape button finishes measurement path and starts a new measurement. Second push to escape turns off the plugin.
  • Double-click also finishes measurement path and starts a new measurement.
  • It's possible to add other units. No need to specify any option value to use defaults.
var options = {
          position: 'topleft',
          lengthUnit: {
            factor: 0.539956803,    //  from km to nm
            display: 'Nautical Miles',
            decimal: 2
          }
        };
L.control.ruler(options).addTo(map);

Default Options

options: {
      position: 'topright',         // Leaflet control position option
      circleMarker: {               // Leaflet circle marker options for points used in this plugin
        color: 'red',
        radius: 2
      },
      lineStyle: {                  // Leaflet polyline options for lines used in this plugin
        color: 'red',
        dashArray: '1,6'
      },
      lengthUnit: {                 // You can use custom length units. Default unit is kilometers.
        display: 'km',              // This is the display value will be shown on the screen. Example: 'meters'
        decimal: 2,                 // Distance result will be fixed to this value. 
        factor: null,               // This value will be used to convert from kilometers. Example: 1000 (from kilometers to meters)  
        label: 'Distance:'           
      },
      angleUnit: {
        display: '&deg;',           // This is the display value will be shown on the screen. Example: 'Gradian'
        decimal: 2,                 // Bearing result will be fixed to this value.
        factor: null,                // This option is required to customize angle unit. Specify solid angle value for angle unit. Example: 400 (for gradian).
        label: 'Bearing:'
      }
    }