Kirill Bychkov

Yes it's square meters. And polygon must be "closed", i.e. first point = last point, for ex.: ``` final p1 = LatLng(45.153474463955796, 39.33852195739747); final p2 = LatLng(45.153474463955796, 39.33972358703614); final p3...

It's possible to use **GpxWriter().asXml**. For ex.: ``` final gpxXml = GpxWriter().asXml(gpx); gpxXml.children[1].setAttribute("xmlns:trp", "http://www.garmin.com/xmlschemas/TripExtensions/v1"); gpxXml.children[1].setAttribute("xsi:schemaLocation", "http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"); gpxXml.toXmlString() ```