Add area calculations

[SpyCop]

For area calculations there are several ways of displaying it:

• GeometryUtils for calculating area
• Can set area to show for polygons on drawing them, maybe you can access the area on creation event to include in database?

It might be useful to add the calculated value to the database, but maybe it is also possible to just calculate the area every time based on the Points in the data base?

[SpyCop]

Not using the Draw plugin, we can use turf.js with their area() function. Using the GeoMan toGeoJSON() on the layer from the pm:create event:

map.on('pm:create', (e) => {
    console.log(e);
    // Add code here for handling creation of
    var type = e.shape,
        layer = e.layer;
    if (type === 'Polygon') {
        geoJSONFt = layer.toGeoJSON();
        geoJSONFt.properties.area = turf.area(geoJSONFt);
        console.log(geoJSONFt);
    };
});