gtran-kml v1.4.5
gtran-kml
Convert geojson to kml file and backwards.
This is a sub-project of gtran.
Installation
npm install gtran-kml
Functions
fromGeoJson(geojson, fileName, options)
Save the geojson into the given file name.
Since 1.1.11, it also supports Mapbox's simplestyle-spec.
options:
documentName - Specify the name of the full document. The Default value is 'My KML'.
documentDescription - Specify the description of the full document. The Default value is 'Converted from GeoJson by gtran-kml'.
name - Specify the feature name using a geojson property. The Default value is 'name'.
featureStyleKey - Specify the xml style key in the xml feature properties.
symbol - Specify feature Symbol. It accepts an symbol object or a function to return the symbol per feature.
Supported styles:
Point
color - HTML color code or array of RGB values, indicating feature color.
alpha - An integer value (0-255), indicating the color opacity
scale - Feature size, a float number.
icon - Link of feature icons. Some generally used icons can be found here.
LineString
color - HTML color code or array of RGB values, indicating feature color.
alpha - An integer value (0-255), indicating the color opacity
width - A float value, indicating line width.
Polygon
color - HTML color code or array of RGB values, indicating feature color.
alpha - An integer value (0-255), indicating the color opacity
fill - A boolean value, indicating whether to fill the polygon.
outline - A boolean value, indicating whether to outline the polygon.
See the detail explaination at KML format reference.
- pretty - Pretty print the output KML. The default value is false.
toGeoJson(fileName)
Read the given file into geojson.
Use Example
const kml = require('gtran-kml');
// Specify promise library if necessary
kml.setPromiseLib(require('bluebird'));
// Read KML file
kml
.toGeoJson('source.kml')
.then((object) {
const geojson = object;
});
const geojson = {
'type': 'FeatureCollection',
'features': [{
'type': 'Feature',
'geometry': {"type":"Point","coordinates":[-70.2532459795475,43.6399758607149]},
'properties': {
'id': 1,
'Name': 'test'
}
}]
};
// Define a symbol for all features in the layer
const pointSymbol = {
color: '#2dcd86',
alpha: 255,
scale: 1,
icon: 'http://maps.google.com/mapfiles/kml/shapes/square.png'
};
// Save geojson into KML file
kml.fromGeoJson(geojson, 'point.kml', {
symbol: pointSymbol,
name: 'Name'
})
// Define a symbol for each individual feature
kml.fromGeoJson(geojson, 'point.kml', {
symbol: (feature) => {
return {
color: '#2dcd86',
alpha: 255 * Math.random(),
scale: 1,
icon: 'http://maps.google.com/mapfiles/kml/shapes/square.png'
}
},
name: 'Name'
})
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