Provides basic tools to create indoor maps with Leaflet.

This plugin provides a layer intended for displaying indoor data (rooms, corridors, ...). It also provides a control component to change the level displayed.

You can see the demo included in the example directory here.

See the included example for usage.

Create a L.Indoor, then add the data to it.

// where data is a GeoJSON feature collection
var indoorLayer = new L.Indoor(data);

// set the initial level to show
indoorLayer.setLevel("0");

indoorLayer.addTo(map);

var levelControl = new L.Control.Level({
    level: "0",
    levels: indoorLayer.getLevels()
});

// Connect the level control to the indoor layer
levelControl.addEventListener("levelchange", indoorLayer.setLevel, indoorLayer);

levelControl.addTo(map);

The data should be a GeoJSON feature collection (or an array of GeoJSON features). With the standard configuration, each feature must have a property attribute "level", which can be a integer, string or array of either (or both).

{
    type: "FeatureCollection",
    features: [
        {
            type: "Feature",
            geometry: ...,
            properties: {
                ...
                level: 1
                ....
            }
        },
        {
            type: "Feature",
            geometry: ...,
            properties: {
                ...
                level: [2, 3]
                ....
            }
        }
    ]
}

If the data is not in this format, you can pass in a replacement getLevel function, that will be used to get the level for each Feature.

var indoorLayer = new L.Indoor(data, {
    getLevel: function(feature) {
        return feature.properties.otherLevel;
    }
    onEachFeature

    markerForFeature
});

L.Control.Level is the user interface component that allows for the easy switching of levels. It takes in some levels (which you can get from the indoor layer by using getLevels()), and displays a list.

var levelControl = new L.Control.Level({
    level: "0",
    levels: indoorLayer.getLevels()
});

When using the L.Control.Indoor, if the levels are not integers, by default, the levels will be converted to integers for the ordering in the control. If the levels given to the control are not integers, then the parseLevel option can be used to replace the default function that uses parseInt(level, 10).

var levelControl = new L.Control.Level({
    level: "1A",
    levels: indoorLayer.getLevels()
    parseLevel: function(level) {
        var levels = {
            "1A": 1,
            "1B": 2,
            "1C": 3,
            "2": 4
        };
        return levels[level];
    }
});

You can then bind the "levelchange" event, to change the level displayed by the layer. Note that the levels that the control has must match that used by the layer, if the levels in the control have been set via getLevels), this should be the case.

levelControl.addEventListener("levelchange", indoorLayer.setLevel, indoorLayer);

L.Control.Level will fire levelchange events when a level is selected.

Leaflet Indoor is free software, and may be redistributed under the BSD 2-Clause License.