tokmz

Convert GeoJsons into KMZ file with layer structure.

Installation

npm install tokmz

Function

The package provide a promised function

• tokmz(geojsons, fileName, options)

  Parameters:

  • geojsons - organized GeoJson layers.

  • fileName - file name of saved kmz file. If undefined/null, the function will return an object that is ready to be written into file.

  • options - optional settings:

    • promiseLib - specified promise library. If undefined, the native Promise will be used.

tokmz() accepts GeoJsons organized using two elements:

• folder

{
    type: 'folder',
    name: 'name_of_folder',
    content: []    // an array containing subfolders and layers
}

• layer

{
    type: 'layer',
    name: 'name_of_layer',
    features: geojson_object,
    options: {
        symbol: feature_symbol,
        name: feature_name_attribute // in geojson.properties
    }
}

Detail about defining feature symbol can be found at gtran-kml.

Sample

var tokmz = require('tokmz');

var polygonJson, polygonSymbol, pointJson, pointSymbol, polylineJson, polylineSymbol;

// Some codes to load all GeoJsons and symbols

var layers = [
    { type: 'folder', name: 'test', content: [
        { type: 'layer', name: 'polygon_layer', features: polygonJson, options: {symbol: polygonSymbol, name: 'Name'} }
    ] },
    { type: 'layer', name: 'point_layer', features: pointJson, options: { symbol: pointSymbol, name: 'Name' } },
    { type: 'layer', name: 'polyline_layer', features: polylineJson, options: { symbol: polylineSymbol, name: 'Name'} }
];

tokmz(layers, 'test.kmz', {
    // if necessary
    promiseLib: require('bluebird')
})
.then(function(fileName) {
    console.log('KMZ file is saved at ' + fileName);
})
.catch(function(err) {
    console.error(err);
});