private static IEnumerable<ISOSpatialRow> GetIsoSpatialRecords(string tlgA, string currentPath)
{
var xmlReader = new XmlReader();
var timHeader = xmlReader.ReadTlgXmlData(currentPath, tlgA + ".xml");
var binaryReader = new BinaryReader();
return binaryReader.Read(currentPath, tlgA + ".bin", timHeader.First()).ToList();
}