leaflet-labeled-circle

Leaflet SVG circle marker with detachable label and text

Usage

$ npm install --save leaflet-labeled-circle

var L = require('leaflet');
var LabeledMarker = require('leaflet-labeled-circle');
 
var map = L.map('map').setView(center, zoom);
 
var feature = {
  "type": "Feature",
  "properties": {
    "text": 122,
    "labelPosition": [
      114.29819682617189,
      22.477347822506356
    ]
  },
  "geometry": {
    "type": "Point",
    "coordinates": [ 114.1952, 22.42658]
  }
};
 
var marker = new LabeledMarker(
  feature.geometry.coordinates.slice().reverse(),
  feature, {
    markerOptions: { color: '#050' }
  }).addTo(map);

You can avoid using GeoJSON here if you want, but I see it as a good data format

API

Marker options

options.markerOptions : {
  // all L.CircleMarker options + following:
  textStyle: {
    color: '#fff',
    fontSize: 12,
    fontFamily: 'Helvetica, Arial, sans-serif'
  },
  shiftY: 6 // to compensate vertical margin, SVG rect is not accurate
}

Anchor marker options

options.anchorOptions = { /* see L.CircleMarker options */ };

Dragging line options

options.lineOptions = { /* see L.Polyline options */ };

Get label text

options.getLabelText = function(marker, feature) {
  // here you can use any field from GeoJSON properties you like
}

Get initial label position

options.getLabelPosition = function(marker, feature, latlng) {
   // here you can get the initial position from the feature data
   // or fall back to the marker coordinates
}

Serialize

marker = new LabeledMarker(latlng, feature, {
  labelPositionKey: 'labelPosition'
});
console.log(marker.toGeoJSON());
// {
//   type: 'Feature',
//   properties: {
//     ...
//     labelPosition: [lon, lat]
//   },
//   geometry: {
//     type: 'Point',
//     coordinates: [lon, lat]
//   }
// }

Alternatively, you can serialize into a GeometryCollection:

marker = new LabeledMarker(latlng, feature, {
  labelPositionKey: 'labelPosition'
});
console.log(marker.toGeoJSON(true));
{
  "type": "Feature",
  "properties": {
    "text": 12,
    "labelPosition": [lon2, lat2],
    "geometriesTypes": [
      "anchor",
      "connection",
      "label",
      "textbox"
    ]
  },
  "geometry": {
    "type": "GeometryCollection",
    "geometries": [
      {
        "type": "Point",
        "coordinates": [lon1, lat1]
      },
      {
        "type": "LineString",
        "coordinates": [
          [lon1, lat1],
          [lon2, lat2]
        ]
      },
      {
        "type": "Point",
        "coordinates": [lon2, lat2]
      },
      {
        "type": "Point",
        "coordinates": [lon2, lat2]
      }
    ]
  }
}

License

The MIT License (MIT)

Copyright (c) 2016 Alexander Milevski

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.