private static void CheckBoundary(XmlNode fieldNode, Field field, Catalog catalog)
{
var polygons = fieldNode.SelectNodes("PLN");
if(polygons.Count == 0)
return;
var boundary = catalog.FieldBoundaries.Single(b => b.Id.ReferenceId == field.ActiveBoundaryId);
MultiPolygonAssert.AreEqual(polygons, boundary.SpatialData);
}